Company lists · Data refreshed September 2026

Top 25 Precision medicine biotech companies based in South San Francisco, United States

Name: Precision medicine biotech companies based in South San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 32 companies tracked

RevenueBase identified 32 precision medicine biotech companies headquartered in South San Francisco, United States as of September 2026 and tracks 2,966 professional contacts across them, including 1,183 with verified work emails. Cambridge is the largest hub.

This list covers precision medicine biotech companies headquartered in South 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 17, 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 17, 2026 86% judged on-target in blind review

32Companies

2,966Contacts tracked

1,183Verified emails

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The 25 largest precision medicine biotech companies based in South San Francisco, United States

Ranked by team size

Top 25 of 32 precision medicine biotech companies based in South San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to precision medicine biotech 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	Verily	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,032 contacts →
	Partial evidence “Verily is an Alphabet company combining a data-driven, people-first approach to bring the promise of precision health to everyone, every day.” Source: RevenueBase Database · checked Sep 17, 2026
2	Ideaya Biosciences	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	224 contacts →
	Strong evidence “IDEAYA is an oncology-focused precision medicine company.” Source: RevenueBase Database · checked Sep 17, 2026
3	Xaira Therapeutics	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	179 contacts →
	Partial evidence “Xaira Therapeutics is an integrated biotechnology company driving advances in artificial intelligence to learn the language of life and transform how we treat disease.” Source: RevenueBase Database · checked Sep 17, 2026
4	Maze Therapeutics	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	140 contacts →
	Strong evidence “Maze Therapeutics is a clinical-stage biopharmaceutical company harnessing the power of human genetics to develop novel, small molecule precision medicines for patients living…” Source: RevenueBase Database · checked Sep 17, 2026
5	Alumis	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	125 contacts →
	Indirect evidence “At Alumis, our goal is to significantly improve the lives of patients by replacing broad immunosuppression with targeted therapies.” Source: RevenueBase Database · checked Sep 17, 2026
6	NGM Biopharmaceuticals	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	116 contacts →
	Partial evidence “NGM Bio is a biopharmaceutical company focused on discovering and developing novel, life-changing medicines for people whose health and lives have been disrupted by disease.” Source: RevenueBase Database · checked Sep 17, 2026
7	Cytomx Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	100 contacts →
	Indirect evidence “CytomX Therapeutics, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
8	Mission BIO	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	95 contacts →
	Partial evidence “Mission Bio is a company of passionate people dedicated to solving complex biological problems with precision engineering, innovative biochemistry, and supported bioinformatics.” Source: RevenueBase Database · checked Sep 17, 2026
9	Human Longevity, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	80 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
10	Circle Pharma, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	75 contacts →
	Indirect evidence “Circle Pharma initiated operations in June 2014 with seed funding from Pfizer, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
11	Senti Biosciences	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	73 contacts →
	Partial evidence “Our mission is to create a new generation of smarter medicines that outmaneuver complex diseases in ways previously inconceivable.” Source: RevenueBase Database · checked Sep 17, 2026
12	Intervenn Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	59 contacts →
	Indirect evidence “We are leveraging artificial intelligence to map the glycoprotein control points that orchestrate disease progression-the missing link that genomics and proteomics can't see.” Source: RevenueBase Database · checked Sep 17, 2026
13	ALX Oncology	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	58 contacts →
	Partial evidence “ALX Oncology (Nasdaq: ALXO) is a clinical-stage biotechnology company advancing therapies that boost the immune system to treat cancer and extend patients’ lives.” Source: RevenueBase Database · checked Sep 17, 2026
14	Addition Therapeutics	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	57 contacts →
	Partial evidence “Addition Therapeutics is on a mission to fulfill the transformative promise of genomic medicine for people impacted by both chronic and rare diseases.” Source: RevenueBase Database · checked Sep 17, 2026
15	Cartography Biosciences	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	56 contacts →
	Partial evidence “Building a smarter roadmap for precision therapeutics.” Source: RevenueBase Database · checked Sep 17, 2026
16	Centivax	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	34 contacts →
	Indirect evidence “Smash the mutants” Source: RevenueBase Database · checked Sep 17, 2026
17	Calithera Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	28 contacts →
	Indirect evidence “Calithera Biosciences is a clinical-stage biopharmaceutical company pioneering the discovery and development of targeted therapies that disrupt cellular metabolic pathways to…” Source: RevenueBase Database · checked Sep 17, 2026
18	Convergent Genomics	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	26 contacts →
	Strong evidence “Convergent Genomics is a precision medicine company that combines advances in genomics and machine learning to detect cancer early and non-invasively.” Source: RevenueBase Database · checked Sep 17, 2026
19	Revir Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence “ReviR Therapeutics is a research and development company whose mission is to harness advanced technologies, machine learning/AI, and the inherent biology embedded within RNA to…” Source: RevenueBase Database · checked Sep 17, 2026
20	Pattern Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	20 contacts →
	Indirect evidence “Pattern Biosciences builds biomolecular computers that run molecular programs in cells to treat cancer and other diseases.” Source: RevenueBase Database · checked Sep 17, 2026
21	Leapfrog BIO	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “Leapfrog Bio is a clinical-stage precision oncology company accelerating cancer drug development by identifying clinical-stage molecules that can be retargeted as directed…” Source: RevenueBase Database · checked Sep 17, 2026
22	Olio Labs	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	13 contacts →
	Indirect evidence “Olio Labs develops combination therapies that deliver better outcomes with fewer side effects.” Source: RevenueBase Database · checked Sep 17, 2026
23	Pragma BIO	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	13 contacts →
	Indirect evidence “Pragma Bio exists to find cures for undruggable immunological disorders.” Source: RevenueBase Database · checked Sep 17, 2026
24	Synlico INC	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	9 contacts →
	Partial evidence “Synlico is a patient-native causal AI biotech building a generative causal discovery and inference platform SynCausal(TM) that learns directed gene causal graphs from primary…” Source: RevenueBase Database · checked Sep 17, 2026
25	Iggenix, INC	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	7 contacts →
	Partial evidence “IgGenix is a clinical-stage, venture backed biotechnology company founded on breakthrough advances in Steve Quake’s laboratory at Stanford in collaboration with allergy clinician…” Source: RevenueBase Database · checked Sep 17, 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: precision medicine biotech 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 precision medicine biotech companies.
Partial evidence: Its own public description names part of precision medicine biotech companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name precision medicine biotech 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 32 precision medicine biotech companies based in South San Francisco, United States

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Precision medicine biotech companies based in South San Francisco, United States at a glance

As of Sep 17, 2026

39.9%Verified-email coverage

92.7Average contacts per company

11-50Median size (employees)

218.8%Largest-city concentration · Cambridge

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for South San Francisco, so it is reported there. Company counts and contact totals on this page are exact for South San Francisco, over 32 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 precision medicine biotech 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 South San Francisco, United States whose own description of what they do matches “precision medicine biotech 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 precision medicine biotech 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 precision medicine biotech companies, and records with no verified work email. Companies headquartered outside South 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, 1,183 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 17, 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.

Precision medicine biotech companies by metro in the United States

Precision medicine biotech companies in Cambridge70
Precision medicine biotech companies in San Diego68
Precision medicine biotech companies in Boston47
Precision medicine biotech companies in New York42
Precision medicine biotech companies in San Francisco40
Precision medicine biotech companies in South San Francisco32
Precision medicine biotech companies in Houston25

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 precision medicine biotech 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 precision medicine biotech companies are there based in South San Francisco, United States?

RevenueBase identified 32 precision medicine biotech companies headquartered in South 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?

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

Which city has the most precision medicine biotech companies?

Cambridge leads with 70 headquartered companies, followed by San Diego (68) and Boston (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 1,183 verified decision-maker contacts tracked across these 32 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 17, 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.