Company lists · Data refreshed September 2026
Top 25 Custom SaaS development agencies based in the United States
RevenueBase identified 1,558 custom SaaS development agencies headquartered in the United States as of September 2026 and tracks 16,183 professional contacts across them, including 3,924 with verified work emails. New York is the largest hub.
This list covers custom SaaS development agencies headquartered in the United States, 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 28, 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.
The 25 largest custom SaaS development agencies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 902 contacts → | ||||
Strong evidence “Trinetix is a global custom software development partner that brings ambitious ideas to life.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 544 contacts → | ||||
Indirect evidence “Droisys is an innovation technology company, with a reputation of delivering top engineering projects and teams to meet, execute, and solve complex business challenges & deliver…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 314 contacts → | ||||
Indirect evidence “Conceptualized in 2015, Sails Software Inc partners with businesses across several industries in making amazing software products with ever evolving technology and processes.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 312 contacts → | ||||
Strong evidence “ITX is a custom software development partner trusted for nearly 30 years to deliver solutions that drive real business value.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 280 contacts → | ||||
Indirect evidence “For more than 35 years, Integrant has engineered enterprise software for companies that can’t afford to get it wrong, in medical devices, life sciences, pharma, financial…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 227 contacts → | ||||
Partial evidence “Alliance Global Services is a software development firm that partners with software, technology and information-intensive businesses on their mission critical work.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 223 contacts → | ||||
Strong evidence “Develux offers full-cycle custom software development services that align with your company’s unique needs and goals.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 217 contacts → | ||||
Partial evidence “Glorium Technologies is a top-shelf bespoke software development firm, boasting 100+ deployed products.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 209 contacts → | ||||
Partial evidence “As one of the premiere custom software providers in Dallas, Fort Worth and the DFW metroplex we live by the promise that our word is our bond.We help you solve IT challenges and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 207 contacts → | ||||
Strong evidence “Pulse Software Solutions is a Denver-based custom software development firm with a proud history of building internet-based systems since 1998.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 181 contacts → | ||||
Partial evidence “Syberry Corporation is a global custom software engineering company.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 175 contacts → | ||||
Partial evidence “We are a SaaS UI/UX design agency working on a subscription-based retainer model with a distributed team of 100+ employees (originated in Kyiv, Ukraine).” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 155 contacts → | ||||
Partial evidence “Finoit is premium full-service software development compant that builds scalable and secure software products for startups and enterprises, helping them drive growth and scale…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 153 contacts → | ||||
Indirect evidence “At Saasvaap, we specialize in delivering next-generation software solutions that help businesses simplify, scale, and succeed.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 139 contacts → | ||||
Strong evidence “EffOne was founded by a team of Software Engineers in 1996, as a California Corporation with the mission of providing custom software development services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 135 contacts → | ||||
Partial evidence “White Rabbit Group is a software development agency with a highly diverse and creative team that takes an idea through development and into scale.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 131 contacts → | ||||
Indirect evidence “Introducing APPWRK IT Solutions: Your Partner for Innovative Digital IT Solutions!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 126 contacts → | ||||
Partial evidence “Top Outsource software development and App Development Company.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 125 contacts → | ||||
Indirect evidence “RedBlink is an IT Solutions Company Headquartered in the San Francisco Bay Area.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 122 contacts → | ||||
Indirect evidence “Axon is a software engineering company that combines deep domain expertise and cross-industry experience, specializes in the building of end-to-end software solutions, and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 122 contacts → | ||||
Indirect evidence “Designed in USA and Developed in Pakistan.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 120 contacts → | ||||
Partial evidence “Outcode Software provides full-scale software development, data analytics, and a range of consulting services from cloud to system architecture.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 111 contacts → | ||||
Partial evidence “Datanetiix is a One-Stop-Solutions provider for your software development, business analytics & IT needs.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 107 contacts → | ||||
Partial evidence “Softxpert is a global Software Development Company that was originally established with a basic mission to provide for a real need in the market for quality software applications…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 100 contacts → | ||||
Strong evidence “FarShore Partners (FSP) is a full-service Custom Software & Product Development Design agency.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
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: custom SaaS development agencies. 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 custom SaaS development agencies.
- Partial evidence
- Its own public description names part of custom SaaS development agencies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name custom SaaS development agencies. 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 1,558 custom SaaS development agencies based in the United States
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Custom SaaS development agencies based in the United States at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,558 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 custom SaaS development agencies, 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 the United States whose own description of what they do matches “custom SaaS development agencies”. 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 custom SaaS development agencies), 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 custom SaaS development agencies, and records with no verified work email. Companies headquartered outside United States 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, 3,924 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 28, 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.
Custom SaaS development agencies by metro
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 custom SaaS development agencies, 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 custom SaaS development agencies are there based in the United States?
RevenueBase identified 1,558 custom SaaS development agencies headquartered in the United States 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?
Trinetix, headquartered in Brentwood, tops this list with the largest team on record.
Which city has the most custom SaaS development agencies?
New York leads with 73 headquartered companies, followed by Austin (54) and Sheridan (47).
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 3,924 verified decision-maker contacts tracked across these 1,558 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 28, 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.
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