Company lists · Data refreshed September 2026
Top 25 Api-first accounting software companies based in the United Kingdom
RevenueBase identified 67 company matches for api-first accounting software companies associated with the United Kingdom as of September 2026 and tracks 1,203 professional contacts across them, including 585 with verified work emails. London is the largest hub.
This list covers company matches for api-first accounting software companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest api-first accounting software companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 322 contacts → | ||||
Exact match “One product.🤳 17 years.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 304 contacts → | ||||
Exact match “Here at Aptitude, we provide software solutions to enable deliver fully autonomous finance so our customers can drive growth, efficiency and sustainability.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 65 contacts → | ||||
Exact match “Xledger is a leading provider of cloud-based finance software.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 62 contacts → | ||||
Exact match “Nomi is the ultimate cloud accounting suite built for accountants and bookkeepers.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 42 contacts → | ||||
Exact match “IRIS is a long-established industry leader in accounting software and services for accountants and bookkeepers.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 41 contacts → | ||||
Exact match “Pegasus Software is one of the UK's leading suppliers of accounting software, cloud accounting software, business solutions and payroll software and has been for over 30 years.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 35 contacts → | ||||
Exact match “At Acting Office we deliver a fully integrated software platform designed for modern accountancy practices that want precision, efficiency and complete visibility across their…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 32 contacts → | ||||
Exact match “Ember is a specialist accounting and tax software platform and was acquired by Starling Bank in 2025.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 30 contacts → | ||||
Exact match “We found that there was often a breakdown in service between your bookkeeper and your accountant and that more often than not the accountant was spending a majority of their time…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 27 contacts → | ||||
Exact match “At Addition Finance, we're revolutionising the landscape of business finance on a global scale.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 26 contacts → | ||||
Exact match “Cloud-native finance and accounting software for multi-entity and multi-currency organisations.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 17 contacts → | ||||
Exact match “Clear Books is a small business supporting small businesses.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 17 contacts → | ||||
Exact match “Welcome to bluQube - a better way to manage finance effectively.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 14 | 16 contacts → | ||||
Exact match “Mayday mends month end for in-house finance teams at complex businesses scaling with Xero or Quickbooks Online as their core accounting system, including those managing multiple…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 15 contacts → | ||||
Exact match “Grow your profits and make your business better with Outserve.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 12 contacts → | ||||
Exact match “MYT Software is the perfect solution for small businesses, freelancers, and accountants looking to streamline their finances and focus on growth.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 9 contacts → | ||||
Exact match “Welcome to SoMax Finance – your trusted partner for cutting-edge cloud accounting solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 8 contacts → | ||||
Exact match “One of the originators of cloud accounting in the UK, the multi-award winning Liquid Accounts is a leader in online accounting software for SME businesses, bookkeepers, and…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 7 contacts → | ||||
Exact match “Datafile is accounting software built for businesses that have outgrown off-the-shelf solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 6 contacts → | ||||
Exact match “We are an accountancy and bookkeeping business with the aim of relieving business owners of unnecessary stress and anxiety.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 3 contacts → | ||||
Exact match “Receipt Bot is the easiest way to automate data extraction from Invoices, Receipts and Bank Statements.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “Better Bookkeeping Solutions Ltd provides cloud bookkeeping, VAT, payroll, CIS, management reporting and accounting software support for growing UK SMEs.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 2 contacts → | ||||
Exact match “Dataflow is a Financial Management Software company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 2 contacts → | ||||
Exact match “Blackcurrant Finance is the platform that connects all financial apps into one consolidated tool.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match “It may sound a cliché, but we are passionate about the solutions we create.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “api-first accounting software companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 67 api-first accounting software companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 585 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Api-first accounting software companies based in the United Kingdom at a glance
As of Sep 27, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 67 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “api-first accounting software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 585 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “api-first accounting software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many api-first accounting software companies are there based in the United Kingdom?
RevenueBase identified 67 company matches for api-first accounting software companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Freeagent tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most api-first accounting software companies?
London leads with 28 company records, followed by Bristol (3) and Croydon (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 585 professional contacts with verified work emails tracked across these 67 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 67 api-first accounting software companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Api-first accounting software companies by geography
- Api-first accounting software companies based in Australia
- Api-first accounting software companies based in Brazil
- Api-first accounting software companies based in Canada
- Api-first accounting software companies based in France
- Api-first accounting software companies based in India
- Api-first accounting software companies based in the Netherlands
- Api-first accounting software companies based in the United States
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Api-first accounting software companies based in Australia
- Api-first accounting software companies based in Brazil
- Api-first accounting software companies based in Canada
- Api-first accounting software companies based in France
- Api-first accounting software companies based in India
- Api-first accounting software companies based in the Netherlands
Company intelligence · public preview
Top 25 api-first accounting software companies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 67 matching company records for api-first accounting software companies based in the United Kingdom, with 1,203 tracked contacts and 585 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 api-first accounting software companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Freeagentfreeagent.comHQ: Edinburgh, United KingdomReported employees: 51-200 | Edinburgh, United Kingdom | 51-200 | Exact match | 322 contacts → |
“One product.🤳 17 years.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Aptitude Softwareaptitudesoftware.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 304 contacts → |
“Here at Aptitude, we provide software solutions to enable deliver fully autonomous finance so our customers can drive growth, efficiency and sustainability.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Xledger UKxledger.co.ukHQ: Bristol, United KingdomReported employees: 201-500 | Bristol, United Kingdom | 201-500 | Exact match | 65 contacts → |
“Xledger is a leading provider of cloud-based finance software.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  NOMInomi.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 62 contacts → |
“Nomi is the ultimate cloud accounting suite built for accountants and bookkeepers.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Iris Accountancyiris.co.ukHQ: Slough, United KingdomReported employees: 1,001-5,000 | Slough, United Kingdom | 1,001-5,000 | Exact match | 42 contacts → |
“IRIS is a long-established industry leader in accounting software and services for accountants and bookkeepers.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Pegasus Softwarepegasus.co.ukHQ: Kettering, United KingdomReported employees: 51-200 | Kettering, United Kingdom | 51-200 | Exact match | 41 contacts → |
“Pegasus Software is one of the UK's leading suppliers of accounting software, cloud accounting software, business solutions and payroll software and has been for over 30 years.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Acting Officeactingoffice.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 35 contacts → |
“At Acting Office we deliver a fully integrated software platform designed for modern accountancy practices that want precision, efficiency and complete visibility across their…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  EMBERember.coHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Ember is a specialist accounting and tax software platform and was acquired by Starling Bank in 2025.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Accounts ETCaccountsetc.comHQ: Cirencester, United KingdomReported employees: 1-10 | Cirencester, United Kingdom | 1-10 | Exact match | 30 contacts → |
“We found that there was often a breakdown in service between your bookkeeper and your accountant and that more often than not the accountant was spending a majority of their time…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Additionadditionfinance.coHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 27 contacts → |
“At Addition Finance, we're revolutionising the landscape of business finance on a global scale.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Aqillaaqilla.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Cloud-native finance and accounting software for multi-entity and multi-currency organisations.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Clear Booksclearbooks.co.ukHQ: West Kensington, United KingdomReported employees: 11-50 | West Kensington, United Kingdom | 11-50 | Exact match | 17 contacts → |
“Clear Books is a small business supporting small businesses.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Bluqube Accounting Softwarebluqube.co.ukHQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 17 contacts → |
“Welcome to bluQube - a better way to manage finance effectively.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Maydaygetmayday.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 16 contacts → |
“Mayday mends month end for in-house finance teams at complex businesses scaling with Xero or Quickbooks Online as their core accounting system, including those managing multiple…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Outserveoutserve.co.ukHQ: Stafford, United KingdomReported employees: 11-50 | Stafford, United Kingdom | 11-50 | Exact match | 15 contacts → |
“Grow your profits and make your business better with Outserve.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  MYTmytsoftware.co.ukHQ: Croydon, United KingdomReported employees: 1-10 | Croydon, United Kingdom | 1-10 | Exact match | 12 contacts → |
“MYT Software is the perfect solution for small businesses, freelancers, and accountants looking to streamline their finances and focus on growth.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Somax Finance LTDso-max.co.ukHQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Welcome to SoMax Finance – your trusted partner for cutting-edge cloud accounting solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Liquid Accountsliquidaccounts.comHQ: Oldham, United KingdomReported employees: 11-50 | Oldham, United Kingdom | 11-50 | Exact match | 8 contacts → |
“One of the originators of cloud accounting in the UK, the multi-award winning Liquid Accounts is a leader in online accounting software for SME businesses, bookkeepers, and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Datafile Software Solutions Limiteddatafile.co.ukHQ: Preston, United KingdomReported employees: 11-50 | Preston, United Kingdom | 11-50 | Exact match | 7 contacts → |
“Datafile is accounting software built for businesses that have outgrown off-the-shelf solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Orange Umbrellaorangeumbrella.co.uk HQ: Newcastle Upon Tyne, United KingdomReported employees: 1-10 | Newcastle Upon Tyne, United Kingdom | 1-10 | Exact match | 6 contacts → |
“We are an accountancy and bookkeeping business with the aim of relieving business owners of unnecessary stress and anxiety.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Receipt BOTreceipt-bot.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 3 contacts → |
“Receipt Bot is the easiest way to automate data extraction from Invoices, Receipts and Bank Statements.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Better Bookkeeping Solutions LTDbetter-bookkeeping-solutions.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Better Bookkeeping Solutions Ltd provides cloud bookkeeping, VAT, payroll, CIS, management reporting and accounting software support for growing UK SMEs.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Dataflow UK Limiteddataflow.co.ukHQ: Staines-upon-thames, United KingdomReported employees: 11-50 | Staines-upon-thames, United Kingdom | 11-50 | Exact match | 2 contacts → |
“Dataflow is a Financial Management Software company.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Blackcurrant Financeblackcurrantfinance.com HQ: Amersham, United KingdomReported employees: 11-50 | Amersham, United Kingdom | 11-50 | Exact match | 2 contacts → |
“Blackcurrant Finance is the platform that connects all financial apps into one consolidated tool.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Konnekt365 Limitedkonnekt365.comHQ: Derby, United KingdomReported employees: 1-10 | Derby, United Kingdom | 1-10 | Exact match | 2 contacts → |
“It may sound a cliché, but we are passionate about the solutions we create.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 67 company matches
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Api-first accounting software companies: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
67 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 67 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for api-first accounting software companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many api-first accounting software companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 67 matching company records, 1,203 tracked contacts and 585 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Api-first accounting software companies by geography
- Api-first accounting software companies based in Australia
- Api-first accounting software companies based in Brazil
- Api-first accounting software companies based in Canada
- Api-first accounting software companies based in France
- Api-first accounting software companies based in India
- Api-first accounting software companies based in the Netherlands
- Api-first accounting software companies based in the United States
Cite this list
RevenueBase Data Team. Top 25 api-first accounting software companies based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/api-first-accounting-software-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Api-first accounting software companies based in Australia
- Api-first accounting software companies based in Brazil
- Api-first accounting software companies based in Canada
- Api-first accounting software companies based in France
- Api-first accounting software companies based in India
- Api-first accounting software companies based in the Netherlands
Company intelligence · public preview
Top 25 api-first accounting software companies based in the United Kingdom
RevenueBase records 67 matching company records for api-first accounting software companies based in the United Kingdom, with 1,203 tracked contacts and 585 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 api-first accounting software companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Freeagentfreeagent.com HQ: Edinburgh, United KingdomReported employees: 51-200 | Edinburgh, United Kingdom | 51-200 | Exact match | 322 contacts → |
“One product.🤳 17 years.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Aptitude Softwareaptitudesoftware.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 304 contacts → |
“Here at Aptitude, we provide software solutions to enable deliver fully autonomous finance so our customers can drive growth, efficiency and sustainability.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Xledger UKxledger.co.uk HQ: Bristol, United KingdomReported employees: 201-500 | Bristol, United Kingdom | 201-500 | Exact match | 65 contacts → |
“Xledger is a leading provider of cloud-based finance software.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | NOMInomi.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 62 contacts → |
“Nomi is the ultimate cloud accounting suite built for accountants and bookkeepers.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Iris Accountancyiris.co.uk HQ: Slough, United KingdomReported employees: 1,001-5,000 | Slough, United Kingdom | 1,001-5,000 | Exact match | 42 contacts → |
“IRIS is a long-established industry leader in accounting software and services for accountants and bookkeepers.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Pegasus Softwarepegasus.co.uk HQ: Kettering, United KingdomReported employees: 51-200 | Kettering, United Kingdom | 51-200 | Exact match | 41 contacts → |
“Pegasus Software is one of the UK's leading suppliers of accounting software, cloud accounting software, business solutions and payroll software and has been for over 30 years.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Acting Officeactingoffice.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 35 contacts → |
“At Acting Office we deliver a fully integrated software platform designed for modern accountancy practices that want precision, efficiency and complete visibility across their…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | EMBERember.co HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 32 contacts → |
“Ember is a specialist accounting and tax software platform and was acquired by Starling Bank in 2025.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Accounts ETCaccountsetc.com HQ: Cirencester, United KingdomReported employees: 1-10 | Cirencester, United Kingdom | 1-10 | Exact match | 30 contacts → |
“We found that there was often a breakdown in service between your bookkeeper and your accountant and that more often than not the accountant was spending a majority of their time…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Additionadditionfinance.co HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 27 contacts → |
“At Addition Finance, we're revolutionising the landscape of business finance on a global scale.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Aqillaaqilla.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Cloud-native finance and accounting software for multi-entity and multi-currency organisations.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Clear Booksclearbooks.co.uk HQ: West Kensington, United KingdomReported employees: 11-50 | West Kensington, United Kingdom | 11-50 | Exact match | 17 contacts → |
“Clear Books is a small business supporting small businesses.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Bluqube Accounting Softwarebluqube.co.uk HQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 17 contacts → |
“Welcome to bluQube - a better way to manage finance effectively.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Maydaygetmayday.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 16 contacts → |
“Mayday mends month end for in-house finance teams at complex businesses scaling with Xero or Quickbooks Online as their core accounting system, including those managing multiple…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Outserveoutserve.co.uk HQ: Stafford, United KingdomReported employees: 11-50 | Stafford, United Kingdom | 11-50 | Exact match | 15 contacts → |
“Grow your profits and make your business better with Outserve.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | MYTmytsoftware.co.uk HQ: Croydon, United KingdomReported employees: 1-10 | Croydon, United Kingdom | 1-10 | Exact match | 12 contacts → |
“MYT Software is the perfect solution for small businesses, freelancers, and accountants looking to streamline their finances and focus on growth.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Somax Finance LTDso-max.co.uk HQ: Bristol, United KingdomReported employees: 11-50 | Bristol, United Kingdom | 11-50 | Exact match | 9 contacts → |
“Welcome to SoMax Finance – your trusted partner for cutting-edge cloud accounting solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Liquid Accountsliquidaccounts.com HQ: Oldham, United KingdomReported employees: 11-50 | Oldham, United Kingdom | 11-50 | Exact match | 8 contacts → |
“One of the originators of cloud accounting in the UK, the multi-award winning Liquid Accounts is a leader in online accounting software for SME businesses, bookkeepers, and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Datafile Software Solutions Limiteddatafile.co.uk HQ: Preston, United KingdomReported employees: 11-50 | Preston, United Kingdom | 11-50 | Exact match | 7 contacts → |
“Datafile is accounting software built for businesses that have outgrown off-the-shelf solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Orange Umbrellaorangeumbrella.co.uk HQ: Newcastle Upon Tyne, United KingdomReported employees: 1-10 | Newcastle Upon Tyne, United Kingdom | 1-10 | Exact match | 6 contacts → |
“We are an accountancy and bookkeeping business with the aim of relieving business owners of unnecessary stress and anxiety.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Receipt BOTreceipt-bot.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 3 contacts → |
“Receipt Bot is the easiest way to automate data extraction from Invoices, Receipts and Bank Statements.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Better Bookkeeping Solutions LTDbetter-bookkeeping-solutions.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Better Bookkeeping Solutions Ltd provides cloud bookkeeping, VAT, payroll, CIS, management reporting and accounting software support for growing UK SMEs.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Dataflow UK Limiteddataflow.co.uk HQ: Staines-upon-thames, United KingdomReported employees: 11-50 | Staines-upon-thames, United Kingdom | 11-50 | Exact match | 2 contacts → |
“Dataflow is a Financial Management Software company.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Blackcurrant Financeblackcurrantfinance.com HQ: Amersham, United KingdomReported employees: 11-50 | Amersham, United Kingdom | 11-50 | Exact match | 2 contacts → |
“Blackcurrant Finance is the platform that connects all financial apps into one consolidated tool.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Konnekt365 Limitedkonnekt365.com HQ: Derby, United KingdomReported employees: 1-10 | Derby, United Kingdom | 1-10 | Exact match | 2 contacts → |
“It may sound a cliché, but we are passionate about the solutions we create.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 67 company matches
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Api-first accounting software companies: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
67 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 67 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for api-first accounting software companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many api-first accounting software companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 67 matching company records, 1,203 tracked contacts and 585 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 api-first accounting software companies based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/api-first-accounting-software-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Api-first accounting software companies based in Australia
- Api-first accounting software companies based in Brazil
- Api-first accounting software companies based in Canada
- Api-first accounting software companies based in France
- Api-first accounting software companies based in India
- Api-first accounting software companies based in the Netherlands