Company lists · Data refreshed September 2026

Top 25 Engagement automation software companies based in San Francisco, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 96 companies tracked

RevenueBase identified 96 engagement automation software companies headquartered in San Francisco, United States as of September 2026 and tracks 9,916 professional contacts across them, including 4,557 with verified work emails. Across the United States, San Francisco is the largest hub for this category.

This list covers engagement automation 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. 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

96Companies

9,916Contacts tracked

4,557Verified emails

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The 25 largest engagement automation software companies based in San Francisco, United States

Ranked by team size

Top 25 of 96 engagement automation software companies based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to engagement automation software companies: 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	Twilio	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,047 contacts →
	Partial evidence “Today's leading companies trust Twilio's Customer Engagement Platform (CEP) to build direct, personalized relationships with their customers everywhere in the world.” Source: RevenueBase Database · checked Sep 28, 2026
2	Moengage	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	908 contacts →
	Partial evidence “MoEngage is an agentic customer engagement platform for the customer-obsessed marketers and product owners.” Source: RevenueBase Database · checked Sep 28, 2026
3	Iterable	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	771 contacts →
	Partial evidence “Iterable is the AI customer engagement platform built for enterprise scale, loved by teams, and trusted by global brands like Priceline, Fabletics, Blockchain, and Box.” Source: RevenueBase Database · checked Sep 28, 2026
4	On24	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	622 contacts →
	Indirect evidence “ON24, a Cvent company, is on a mission to help businesses bring their go-to-market strategy into the AI era and drive cost-effective revenue growth.” Source: RevenueBase Database · checked Sep 28, 2026
5	Changeengine	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	n/a	182 contacts →
	Indirect evidence “ChangeEngine is the AI-powered employee experience orchestration platform that redefines how People teams design, launch, and scale employee programs across the entire employee…” Source: RevenueBase Database · checked Sep 28, 2026
6	ZUDDL	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	129 contacts →
	Indirect evidence “Zuddl is an events platform built for B2B marketing teams.” Source: RevenueBase Database · checked Sep 28, 2026
7	Blueshift	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	97 contacts →
	Partial evidence “Blueshift, headquartered in San Francisco, enables brands to automate and personalize engagement across every marketing channel.” Source: RevenueBase Database · checked Sep 28, 2026
8	Mailmodo	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	88 contacts →
	Indirect evidence “Mailmodo is a complete email marketing solution enabling users to create and send app-like interactive emails to improve email conversions.” Source: RevenueBase Database · checked Sep 28, 2026
9	Landbase	Indirect evidence	San Francisco, United StatesHQ checked Sep 28, 2026	11-50	63 contacts →
	Indirect evidence “Landbase is the agentic AI company that helps you find your next customer.” Source: RevenueBase Database · checked Sep 28, 2026
10	Certain	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	55 contacts →
	Partial evidence “Certain® provides the leading enterprise event automation solution that helps both data-driven marketers and event professionals to bring events into cross-channel marketing…” Source: RevenueBase Database · checked Sep 28, 2026
11	lava.ai	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	47 contacts →
	Indirect evidence “Customers expect instant gratification – yet existing systems were architected for slower, scheduled responses using historical data after the customer has left.” Source: RevenueBase Database · checked Sep 28, 2026
12	Chatfuel	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	45 contacts →
	Indirect evidence “Chatfuel is the #1 platform for businesses that sell and grow through social media.” Source: RevenueBase Database · checked Sep 28, 2026
13	BLAZE	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	44 contacts →
	Indirect evidence “Blaze is the first AI agent that does your marketing for you.” Source: RevenueBase Database · checked Sep 28, 2026
14	Eloqua	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	36 contacts →
	Strong evidence “Eloqua, a wholly-owned subsidiary of Oracle, is the leading provider of modern marketing automation and revenue performance management software that helps ensure every component…” Source: RevenueBase Database · checked Sep 28, 2026
15	Questera	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	33 contacts →
	Partial evidence “The First Agentic Customer Engagement Platform.” Source: RevenueBase Database · checked Sep 28, 2026
16	Waymore	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	27 contacts →
	Strong evidence “WayMore is an innovative and powerful marketing and business operations automation software that enables a company to reach its goals.” Source: RevenueBase Database · checked Sep 28, 2026
17	Conversion	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	25 contacts →
	Partial evidence “Conversion is the agentic marketing automation platform built for B2B teams that want to move faster than their stack allows.” Source: RevenueBase Database · checked Sep 28, 2026
18	Mailmunch	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Mailmunch is the one-stop lead generation and marketing platform that allows you to grow your business with lead capture and email automation tools to reach your audience with a…” Source: RevenueBase Database · checked Sep 28, 2026
19	Markovml	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	19 contacts →
	Indirect evidence “MarkovML is a sales intelligence engine that accelerates every aspect of your campaign execution.” Source: RevenueBase Database · checked Sep 28, 2026
20	VIRIO	Indirect evidence	San Francisco, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Everyone wants to generate more leads for their B2B business, and we cracked the code.” Source: RevenueBase Database · checked Sep 28, 2026
21	Bitscale	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	16 contacts →
	Partial evidence “Bitscale is a signal-first GTM automation platform that finds in-market accounts, enriches them deeply, and runs workflows end to end.” Source: RevenueBase Database · checked Sep 28, 2026
22	Arrow AI	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
23	Maverick	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	15 contacts →
	Indirect evidence “Your emails deserve better.” Source: RevenueBase Database · checked Sep 28, 2026
24	Salestools	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “Salestools.io helps sales teams use AI and Automation with AI Sales Agents.” Source: RevenueBase Database · checked Sep 28, 2026
25	cast.app	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Cast.app, #1 automation platform to drive growth, revenue, and referrals from existing customers Learn more at: https://cast.app/product.” Source: RevenueBase Database · checked Sep 28, 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: engagement automation software companies. 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 engagement automation software companies.
Partial evidence: Its own public description names part of engagement automation software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engagement automation software companies. 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 96 engagement automation software companies based in San Francisco, United States

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Engagement automation software companies based in San Francisco, United States at a glance

As of Sep 28, 2026

46.0%Verified-email coverage

103.3Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 96 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 engagement automation software companies, 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 San Francisco, United States whose own description of what they do matches “engagement automation software companies”. 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 engagement automation software companies), 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 engagement automation software companies, and records with no verified work email. Companies headquartered outside San Francisco 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, 4,557 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.

Engagement automation software companies by metro in the United States

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 engagement automation software companies, 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 engagement automation software companies are there based in San Francisco, United States?

RevenueBase identified 96 engagement automation software companies headquartered in San Francisco, 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?

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

Which city in the United States has the most engagement automation software companies?

San Francisco leads the United States with 96 headquartered companies, followed by New York (83) and Los Angeles (49).

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 4,557 verified decision-maker contacts tracked across these 96 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.