Company lists · Data refreshed September 2026

Top 25 Open source sales automation software companies based in the United States

Name: Open source sales automation software companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 306 companies tracked

RevenueBase identified 306 open source sales automation software companies headquartered in the United States as of September 2026 and tracks 4,646 professional contacts across them, including 1,444 with verified work emails and 844 with mobile numbers. New York is the largest hub.

This list covers open source sales automation software companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

306Companies

4,646Contacts tracked

1,444Verified emails

844Mobile numbers

Unlock all 306 companies Free signup · no credit card · 500 free credits

The 25 largest open source sales automation software companies based in the United States

Ranked by team size

Top 25 of 306 open source sales automation software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names open source sales automation software companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	PipedrivePartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	970
	“Founded in 2010, Pipedrive is an easy and effective sales CRM that drives small business growth.” Source: company website · checked Sep 5, 2026
2	KEAPPartial evidence	Chandler, AZ, United StatesHQ checked Sep 5, 2026	201-500	192
	“With Keap, you'll easily capture, organize, track, and nurture all of your leads to increase sales and revenue.” Source: company website · checked Sep 5, 2026
3	CLOSEPartial evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	51-200	140
	“Close is the sales CRM built for founders, startups, and small businesses that want to grow faster.” Source: company website · checked Sep 5, 2026
4	Pipeliner CRMPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 5, 2026	51-200	132
	“Pipeliner has revolutionized the complexity of CRM with a simple, unique visual interface, a no-code workflow automation engine, and instant, dynamic insights and reporting.” Source: company website · checked Sep 5, 2026
5	ClientifyIndirect evidence	New York, United StatesHQ checked Sep 5, 2026	51-200	118
	“Stop playing house and start closing deals.” Source: company website · checked Sep 5, 2026
6	OntraportIndirect evidence	Covina, CA, United StatesHQ checked Sep 5, 2026	51-200	116
	“Bringing the power of enterprise CRM to your business.” Source: company website · checked Sep 5, 2026
7	Genesis Digital, LLCStrong evidence	Las Vegas, NV, United StatesHQ checked Sep 5, 2026	51-200	104
	“Genesis Digital empowers entrepreneurs and small business owners to achieve financial freedom with affordable and easy-to-use marketing and sales automation software, and a…” Source: company website · checked Sep 5, 2026
8	Agile CRM By MantraStrong evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	51-200	100
	“Agile CRM is the world’s first fully-integrated sales, marketing, and service suite – an All-in-One CRM for small businesses with full sales, marketing, and service automation…” Source: company website · checked Sep 5, 2026
9	Constant Contact Lead GEN & CRMStrong evidence	Gainesville, FL, United StatesHQ checked Sep 5, 2026	1,001-5,000	72
	“SharpSpring is a full-funnel marketing and sales automation platform that unites marketing and sales teams to launch and track targeted campaigns and personalize every interaction…” Source: company website · checked Sep 5, 2026
10	Builder PrimeIndirect evidence	Denver, CO, United StatesHQ checked Sep 5, 2026	51-200	70
	“Builder Prime is the all-in-one CRM built for growth-minded home improvement companies.” Source: company website · checked Sep 5, 2026
11	Insightly CRM By UnbounceIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	51-200	67
	“Insightly, the new breed of CRM, helps modern businesses of all sizes build lifelong customer relationships and grow faster than ever before.” Source: company website · checked Sep 5, 2026
12	NutshellStrong evidence	Ann Arbor, MI, United StatesHQ checked Sep 5, 2026	11-50	64
	“The time-saving CRM For sales and marketing teams who want to maximize efficiency and revenue, Nutshell is a CRM and marketing automation platform that saves time and accelerates…” Source: company website · checked Sep 5, 2026
13	Lead LiaisonStrong evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	11-50	64
	“Lead Liaison is an application development company that designs, develops, and sells cloud-based marketing and sales automation software.” Source: company website · checked Sep 5, 2026
14	IcentrisPartial evidence	Woods Cross, UT, United StatesHQ checked Sep 5, 2026	51-200	62
	“Our mission is to empower individuals and companies to grasp their full potential with a virtual office that increases productivity and has measurable sales results.” Source: company website · checked Sep 5, 2026
15	NimbleIndirect evidence	Santa Monica, CA, United StatesHQ checked Sep 5, 2026	11-50	60
	“Nimble is your CRM for smarter email marketing, engagement, and business growth.” Source: company website · checked Sep 5, 2026
16	Nethunt CRMPartial evidence	Middletown, DE, United StatesHQ checked Sep 5, 2026	11-50	49
	“NetHunt CRM is the only tool you’ll need for outbound sales.” Source: company website · checked Sep 5, 2026
17	Sendcrux LabsStrong evidence	Green Cove Springs, FL, United StatesHQ checked Sep 5, 2026	51-200	48
	“Sendcrux labs is building sales and marketing automation tools to help organisations to achieve the following goals cost-effectively- Boost revenues- Lead Generation- Nurture…” Source: company website · checked Sep 5, 2026
18	ScratchpadIndirect evidence	Covina, CA, United StatesHQ checked Sep 5, 2026	51-200	38
	“Scratchpad removes admin work for sellers, keeps Salesforce accurate, and helps every deal run sharper from discovery to close.” Source: company website · checked Sep 5, 2026
19	Shape SoftwareStrong evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	37
	“Shape is the AI-powered CRM, sales, and marketing automation platform built for mortgage, solar, education, insurance, and more.” Source: company website · checked Sep 5, 2026
20	TwentyStrong evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	n/a	37
	“Building the modern Salesforce, powered by the Open Source community: http://github.com/twentyhq/twenty” Source: company website · checked Sep 5, 2026
21	SalesmateStrong evidence	Charlotte, NC, United StatesHQ checked Sep 5, 2026	201-500	37
	“Welcome to Salesmate Salesmate is the Unified Customer Platform that brings your sales, marketing, and support teams together on a single source of customer truth.” Source: company website · checked Sep 5, 2026
22	DYLPartial evidence	Marina Del Rey, CA, United StatesHQ checked Sep 5, 2026	11-50	36
	“DYL empowers businesses with the all tools needed to convert prospects into sales and customers into loyal fans.” Source: company website · checked Sep 5, 2026
23	CrmoneIndirect evidence	Menlo Park, CA, United StatesHQ checked Sep 5, 2026	51-200	32
	“CRMOne is a leading CRM platform that helps businesses to manage day-to-day business activities in one place.” Source: company website · checked Sep 5, 2026
24	Less Annoying CRMIndirect evidence	St Louis, MO, United StatesHQ checked Sep 5, 2026	11-50	28
	“Less Annoying CRM is a simple CRM built from the ground up for small businesses.” Source: company website · checked Sep 5, 2026
25	Pipeline CRMPartial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	11-50	25
	“Pipeline CRM is a sales CRM platform that helps sales teams close complex deals faster.” Source: company website · checked Sep 5, 2026

Showing 25 of 306 open source sales automation software companies based in the United States

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Open source sales automation software companies based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 12 HQs

844Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

154

11-50

109

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

1,350

31–60

61–90

90–180

180+

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 open source sales automation software companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “open source sales automation software companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among open source sales automation software companies, 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 an evidence 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, 1,444 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 5, 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.

Frequently asked

How many open source sales automation software companies are there based in the United States?

RevenueBase identified 306 open source sales automation software companies 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?

Pipedrive, headquartered in New York, tops this list with the largest team on record.

Which city has the most open source sales automation software companies?

New York leads with 12 headquartered companies, followed by San Francisco (12) and Los Angeles (7).

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 1,444 verified decision-maker contacts tracked across these 306 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 5, 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 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.