Company lists · Data verified August 2026

Top 18 Cold email software companies based in San Francisco, United States

Name: Cold email software companies based in San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 43 companies tracked

There are 43 cold email software companies headquartered in San Francisco, United States (RevenueBase, August 2026). RevenueBase tracks 965 professional contacts across them, including 419 with verified work emails and 298 with mobile numbers. New York is the largest hub.

This list covers cold email software companies headquartered in San Francisco, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

43Companies

965Contacts tracked

419Verified emails

298Mobile numbers

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The 18 largest cold email software companies based in San Francisco, United States

Ranked by team size

Top 18 of 43 cold email software companies based in San Francisco, United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Artisan	San Francisco	51-200	211	37
2	Flodesk	San Francisco, CA	51-200	76	63
3	Landbase	San Francisco	11-50	62	34
4	Throxy YC P25	San Francisco, CA	11-50	56	9
5	AISDR	San Francisco, CA	11-50	45	21
6	Opensense	San Francisco, CA	11-50	32	22
7	Revenoid	San Francisco, CA	11-50	31	5
8	Growbots	San Francisco, CA	11-50	26	9
9	Maverick	San Francisco, CA	1-10	14	2
10	Gocustomer	San Francisco, CA	11-50	11	4
11	Mission Inbox	San Francisco, CA	1-10	10	2
12	Accountstory	San Francisco, CA	1-10	9	1
13	DOKAI	San Francisco	1-10	5	3
14	Zapmail	San Francisco	1-10	5	2
15	Firstquadrant	San Francisco	1-10	3	2
16	Leapstone AI	San Francisco, CA	1-10	3	2
17	remail.io	San Francisco, CA	11-50	3	1
18	Equatalent	San Francisco, CA	1-10	2	1

Showing 18 of 43 cold email software companies based in San Francisco, United States

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Cold email software companies based in San Francisco, United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 40 HQs

298Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Cold email software companies by metro in the United States

Metro	Companies
Cold email software companies in New York	40
Cold email software companies in San Francisco	40
Cold email software companies in Sheridan	33
Cold email software companies in Austin	21
Cold email software companies in Los Angeles	17
Cold email software companies in New York City	15
Cold email software companies in Atlanta	11

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cold email software companies”, with match quality audited by blind human judging, and headquartered in San Francisco, United States.
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: Contact records re-verify on a rolling cadence; 2 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cold email software companies are there based in San Francisco, United States?

There are 43 cold email software companies headquartered in San Francisco, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Artisan, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most cold email software companies?

New York leads with 40 headquartered companies, followed by San Francisco (40) and Sheridan (33).

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 419 verified decision-maker contacts tracked across these 43 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.