Company lists · Data refreshed September 2026

Top 25 Startup software development firms based in London, United Kingdom

Name: Startup software development firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 667 companies tracked

RevenueBase identified 667 startup software development firms headquartered in London, United Kingdom as of September 2026 and tracks 5,599 professional contacts across them, including 887 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers startup software development firms headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

667Companies

5,599Contacts tracked

887Verified emails

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The 25 largest startup software development firms based in London, United Kingdom

Ranked by team size

Top 25 of 667 startup software development firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to startup software development firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Dreams Technologies, UK & India	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	221 contacts →
	Partial evidence “At Dreams Technologies, we’re more than software engineers, we’re digital transformation partners.” Source: RevenueBase Database · checked Sep 29, 2026
2	Magora	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	213 contacts →
	Strong evidence “Magora is an international software development company with 12 years of extensive experience in bespoke development outsourcing market.” Source: RevenueBase Database · checked Sep 29, 2026
3	Emvigo Technologies	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	204 contacts →
	Indirect evidence “Emvigo Technologies – The Power of Getting Things Done We believe that great ideas don’t just happen-they need the right team to bring them to life, fast.” Source: RevenueBase Database · checked Sep 29, 2026
4	YLD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	166 contacts →
	Partial evidence “YLD is a software engineering, data engineering, and product design consultancy, specialising in customer experience and disruptive technologies.” Source: RevenueBase Database · checked Sep 29, 2026
5	scrums.com	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	163 contacts →
	Partial evidence “Scrums.com is the Software Engineering Orchestration Platform (SEOP).” Source: RevenueBase Database · checked Sep 29, 2026
6	Opinov8	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	154 contacts →
	Indirect evidence “Winner of the Best AI Company Award by The Netty Awards · Headquartered in London, powered by a worldwide team of engineers across Europe, Egypt, and the Americas.” Source: RevenueBase Database · checked Sep 29, 2026
7	Xynotech	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	96 contacts →
	Strong evidence “Xynotech is a provider of IT consulting and software development services that help companies overtake their competition.” Source: RevenueBase Database · checked Sep 29, 2026
8	Honeycomb Software	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	95 contacts →
	Strong evidence “Honeycomb Software is a global software engineering company that helps startups, scale-ups, and enterprises bring digital products to market faster and smarter.” Source: RevenueBase Database · checked Sep 29, 2026
9	SIYA	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	87 contacts →
	Partial evidence “We are Siya Tech, a startup studio where we partner with tech startups to fuel their growth.” Source: RevenueBase Database · checked Sep 29, 2026
10	Clurgo	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	76 contacts →
	Partial evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 29, 2026
11	Turn UP Technologies	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	74 contacts →
	Indirect evidence “Turn Up Technologies is a digital growth IT firm headquartered in London, UK with offices across the Texas, UAE, Canada, and Pakistan.” Source: RevenueBase Database · checked Sep 29, 2026
12	Timspark	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	73 contacts →
	Strong evidence “Timspark is a software development company/hub that creates custom software solutions to fit clients’ business needs.” Source: RevenueBase Database · checked Sep 29, 2026
13	Appolica Venture Studio	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	51 contacts →
	Indirect evidence “Appolica is a venture studio on a mission to turn ambitious tech-driven ventures into market leaders.” Source: RevenueBase Database · checked Sep 29, 2026
14	Elitex	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	51 contacts →
	Strong evidence “ELITEX is a custom software development company with a focus on UI Modernisation and DevOps.” Source: RevenueBase Database · checked Sep 29, 2026
15	Pixelfield	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	46 contacts →
	Indirect evidence “We are the guides on your exciting journey around the digital world.” Source: RevenueBase Database · checked Sep 29, 2026
16	Blockmob Labs	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	46 contacts →
	Partial evidence “Blockmob Labs is a full-stack product engineering studio building production-grade software across Web3, AI, fintech, SaaS, mobile, and cloud infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026
17	Limeup	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	42 contacts →
	Strong evidence “Limeup is an application & software development company.” Source: RevenueBase Database · checked Sep 29, 2026
18	Devgrid	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	39 contacts →
	Partial evidence “DevGrid was Founded in 2015 by a group of seasoned tech entrepreneurs on a mission to make outsourced product development a positive and productive experience.” Source: RevenueBase Database · checked Sep 29, 2026
19	Mifort	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	39 contacts →
	Strong evidence “We are a software development outsourcing company with 9+ years in business and 200+ successful projects.” Source: RevenueBase Database · checked Sep 29, 2026
20	Codeleap	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	37 contacts →
	Indirect evidence “CodeLeap partners with ambitious companies to build and scale digital products.” Source: RevenueBase Database · checked Sep 29, 2026
21	The Tech Galore	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	37 contacts →
	Strong evidence “We are a leading global software development company that enables disruptive startups and enterprises to bridge the gap between Ideas and Reality through innovative web and…” Source: RevenueBase Database · checked Sep 29, 2026
22	Avamae Software Solutions LTD	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	35 contacts →
	Strong evidence “AVAMAE is a London-based product development agency, building bespoke mobile, software and web applications since 2011.” Source: RevenueBase Database · checked Sep 29, 2026
23	Stallions Technologies	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	35 contacts →
	Indirect evidence “At Stallions Technologies, we passionately believe that we are successful in delivering excellence to our clients because we deliberately seek to hire 'Brilliant' people.” Source: RevenueBase Database · checked Sep 29, 2026
24	Kernelics	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	35 contacts →
	Partial evidence “Kernelics is a passionate team of web and mobile software developers, product managers, designers, and QA engineers.” Source: RevenueBase Database · checked Sep 29, 2026
25	Zentix	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	30 contacts →
	Strong evidence “ZentixSoft is a UK-based software development company helping businesses grow faster with AI, automation, and custom software.” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: startup software development firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names startup software development firms.
Partial evidence: Its own public description names part of startup software development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name startup software development firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 667 startup software development firms based in London, United Kingdom

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Startup software development firms based in London, United Kingdom at a glance

As of Sep 29, 2026

15.8%Verified-email coverage

8.4Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

360

11-50

253

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 667 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among startup software development firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “startup software development firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names startup software development firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among startup software development firms, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 887 across the full list. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Startup software development firms by metro in the United Kingdom

Startup software development firms in Bristol25

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names startup software development firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many startup software development firms are there based in London, United Kingdom?

RevenueBase identified 667 startup software development firms headquartered in London, United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Dreams Technologies, UK & India, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most startup software development firms?

London leads the United Kingdom with 667 headquartered companies, followed by Manchester (44) and Birmingham (38).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 887 verified decision-maker contacts tracked across these 667 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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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 Smart Search, 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.