Best API Management Companies in San Francisco, United States
The 66 best API Management companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Postman.
Ranked: Best API Management companies in San Francisco
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Postman 🦄 Provider of platform unifying API design, testing, documentation, monitoring, and discovery | $434M | 58 mo ago | Series D | 279 | Abhinav Asthana Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+42 | — | 2 launchs |
| 2 | MuleSoft 🦄 Cloud based API management platform | $259M | 120 mo ago | Series G | 663 663 → 1,120 (+69%) | — | WordPressMySQLMariaDB+34 | 30 patents Automated API integration, data mapping, and schema transformation for enterprise software connectivity. | 3 launchs |
| 3 | Kong 🦄 Cloud based API management and microservices connectivity platform 84Tech top 18%Patents top 20%Funding top 21%Moat top 22% All 11 signals ▾Techtop 18% Patentstop 20% Fundingtop 21% Moattop 22% Innovationtop 30% Markettop 33% Globaltop 37% Growthtop 38% Talenttop 38% Producttop 41% Newsbottom 21% Tech: 76 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Patents: 188 patents matched (strict assignee match) · 44 filings since 2022 vs 44 in 2017-21 rank vs industry peers · Fliar Intelligence Index 84/100 | $249M | 19 mo ago | Series E | 128 | Marco Palladino Co-Founder & CTO | SentryApple iCloud MailGoogle Workspace+35 | 187 patents AI-driven microservice gateway and API documentation for intelligent query routing | — |
| 4 | Hasura 🦄 Developer of data access and AI integration software for businesses | $239M | 52 mo ago | Series C | 69 | Tanmai Gopal Co-Founder & CEO | Node.jsRadix UITailwind CSS+25 | — | — |
| 5 | Apollo GraphQL 🦄 API transformation and validation tool | $152M | 58 mo ago | Series D | 248 | Geoff Schmidt Co-Founder & CEO | DatoCMSSentryAtlassian Statuspage+29 | — | — |
| 6 | Traceable Security Cloud based API security solution | $110M | 25 mo ago | Series B | 98 98 → 62 (-37%) | Sanjay Nagaraj Co-Founder and CTO at Traceable.ai | WebflowSentryAtlassian Statuspage+26 | — | — |
| 7 | Transposit Cloud-based API management platform | $50M | 69 mo ago | Series B | 32 | Divanny Lamas CEO | — | 11 patents Enables low-code workflow automation and integration via actionable markdown and component relation engine | — |
| 8 | Composio Platform to integrate AI agents and large language models with their technology stack | $29M | 15 mo ago | Series A | — | Karan Vaidya Co-Founder | WordPressMySQLPHP+32 | — | — |
| 9 | Mashery API management portal | $28M | 167 mo ago | Acqui-Hired | 97 | — | BootstrapZURB FoundationAmazon Web Services+8 | — | — |
| 10 | Mashape Unified API platform for managing, securing, and governing APIs and microservices | $28M | 111 mo ago | Acquired | 211 | — | — | 2 patents Cloud-based API management and gateway platform for distributing and consuming web services | 1 launch |
| 11 | Wallarm API security platform delivering complete protection against attacks and abuse | $20M | 10 mo ago | Series C | 6 | Stepan Ilyin Co-Founder | WordPress Block EditorWordPressMySQL+31 | 10 patents AI-driven API security and L7 threat detection for firewalls and IDS | — |
| 12 | Pipedream Cloud based API integration platform | $20M | 49 mo ago | Acquired | 8 | Jason Endo Co-Founder | Node.jsClerkRadix UI+23 | — | — |
| 13 | Moesif Provider of API testing and monitoring tools | $16M | 58 mo ago | Acquired | 17 17 → 15 (-12%) | Derric Gilling Co-founder & CEO | Azure Front DoorAzureReact+19 | 10 patents API usage analytics and management platform for monitoring, security, retention, and sampling. | — |
| 14 | Speakeasy Platform offering API management solution | $15M | 37 mo ago | Seed | 28 28 → 45 (+61%) | Sagar Batchu Co-Founder & CEO | — | 7 patents Personalized interactive display systems integrating environmental controls and social-driven product recommendations. | 1 job opening · 1 partnership |
| 15 | ReadMe Documentation and digital transaction management software | $9M | 81 mo ago | Series A | 66 | Gregory Koberger Founder | SentryReadMeBootstrap+29 | — | 1 launch |
| 16 | Apiary API design, development, documentation platform for developers, fostering collaboration and innovation | $8M | 130 mo ago | Acquired | 30 | — | Backbone.jsUnderscore.jsLodash+8 | — | — |
| 17 | Platformatic API development software for developers | $8M | 20 mo ago | Seed | 9 | Matteo Collina Co-Founder | DocusaurusRadix UITailwind CSS+15 | — | — |
| 18 | Runscope API monitoring platform ensuring uptime, performance, and data validation | $7M | 146 mo ago | Acquired | 50 | — | — | — | — |
| 19 | 3scale Cloud-based solutions for API management | $5M | 158 mo ago | Acquired | 7,995 | — | — | — | — |
| 20 | Akto Platform offering API security solution | $4M | 43 mo ago | Seed | 10 | Ankush Jain Co-Founder & CTO | Framer SitesYouTubeReact+22 | — | — |
| 21 | Apible API testing solutions provider | $4M | 67 mo ago | Series A | — | Jakub Roztocil Founder & CEO | — | — | — |
| 22 | HyperTest Platform offering API testing software | $2M | 42 mo ago | Seed | 13 | Karan Raina Co-Founder & CTO | Wix eCommerceWixSentry+28 | — | — |
| 23 | Singly App integration with third party service | $2M | 184 mo ago | Acquired | — | Jeremie Miller Co-Founder | — | — | — |
| 24 | LunchBadger Serverless microservices platform | $2M | 112 mo ago | Deadpooled | — | Albert Tsang Founder & CEO | — | — | — |
| 25 | Unkey Platform providing API key management solutions | $2M | 31 mo ago | Seed | — | Andreas Thomas Co-Founder & CTO | TurbopackNode.jsRadix UI+14 | — | — |
| 26 | Keploy Developer of open-source platform for API, integration, and unit testing | $1M | 51 mo ago | Seed | 10 | Shubham Jain Co-Founder | NacelleNode.jsGraphQL+22 | — | — |
| 27 | Monster API Platform offering API integration solutions | $1M | 36 mo ago | Seed | 3 | Saurabh Vij Co-Founder & CEO | TypeScriptMantineBootstrap+25 | — | — |
| 28 | KushoAI Provider of an AI-powered platform for software reliability and security | $600K | 28 mo ago | Seed | — | Sourabh Gawande Co-Founder & CTO | GhostNode.jsVarnish+19 | — | — |
| 29 | Subtrace Cloud based API monitoring platform | $500K | 12 mo ago | Seed | — | Sachin Sridhar Co-Founder & CTO | — | — | — |
| 30 | Optic API documentation solution provider | $150K | 94 mo ago | Seed | 9 | — | — | — | — |
| 31 | OneGraph API integration solution | $150K | 96 mo ago | Acquired | 3 | Daniel Woelfel Co-Founder | — | — | — |
| 32 | Metlo Provider of API Security tool | $125K | 57 mo ago | Seed | 4 | Akshay Shekhawat Co-Founder & CTO | — | — | — |
Top 12 API Management companies in San Francisco
#1
Kong 🦄Series E · San Francisco, California · founded 2009 · 128 employees$249.3Mraised▾
Cloud based API management and microservices connectivity platform. It operates through RESTful API and is built on NGINX. It inspects and monitors APIs and microservice traffic. It provides ready to deploy plugins and adds functionality to APIs and applications. It also offers the flexibility to run on the cloud of the users choice such as AWS, Azure, Google Cloud. It has clients such as Cisco, GSK, Paypal, etc.
- Nov 2024Series E—
- Aug 2024Series D$80M
- Dec 2020Series D$100M
- Dec 2018Series C$43M
#2
Series C · San Francisco, California · founded 2013 · 6 employees$20.1Mraised▾
API security platform delivering complete protection against attacks and abuse. It is a B2B SaaS company that provides a comprehensive solution for application and API security. The platform offers advanced API security, including API discovery, security testing, and abuse prevention. It helps organizations discover all APIs, detect and stop attacks, respond to incidents, and test APIs for security issues. It caters to various industries, including technology, healthcare, fintech, and e-commerce, and supports multiple cloud platforms like AWS, GCP, and Azure. The platform provides real-time API threat protection, AI agent security, and API SOC services. It offers features such as credential stuffing detection, API leak management, and cloud-native WAAP. The company focuses on protecting APIs and AI agents from threats, providing visibility, automated response, and integrations.
- Jul 2025Series C$55M
- Sep 2023Series A$9.2M
- Oct 2018Series A$8M
- Dec 2016Series A$2.3M
#3
Series A · San Francisco, California · founded 2023$29Mraised▾
Platform to integrate AI agents and large language models with their technology stack. The platform enables developers to integrate AI capabilities into their applications, streamlining the development process. It supports unlimited integrations, suitable for individual developers, startups, and large enterprises. It emphasizes data protection through security measures such as encryption and secure access protocols.
- Mar 2025Series A$25M
- Jul 2023Seed$4M
#4
Series B · San Francisco, California · founded 2018 · 98 employees$110.2Mraised▾
Cloud based API security solution. The platform uses distributed tracing, cloud-native integrations, and behavioral analytics to deliver application and API security. It enables users to discover, monitor, visualize, and correlate application code changes to transactions, API endpoints, and specifications. The platform allows users to track and discover changes to the API in real time.
- May 2024Series B$30M
- May 2022Series B$60M
- Feb 2021Angel$250K
- Jul 2020Series A$20M
#5
Seed · San Francisco, California · founded 2022 · 9 employees$7.8Mraised▾
API development software for developers. It offers a DB tool that enables developers to develop both open API and Grapghql schema APIs. It allows users to access open API composition, analyze services, and manage code updates. The platform supports databases such as SQLite, MySQL, MariaDB, and more.
- Sep 2024Seed$4.3M
- Jun 2023Seed$3.5M
#6
Seed · San Francisco, California · founded 2024$500Kraised▾
Cloud based API monitoring platform. It is an API observability tool that connects backend to Chrome devtools to inspect the latency of each API request. It allows developers to track API requests and resolve production issues in real time.
- 2025Seed$500K
#7
Postman 🦄Series D · San Francisco, California · founded 2014 · 279 employees$434Mraised▾
Provider of platform unifying API design, testing, documentation, monitoring, and discovery. The platform integrates with gateways and Git solutions. It allows defining application programming interfaces collaboratively with support for standards. The platform helps to organize application programming interface requests, collaborate across teams, and automate workflows. It also helps to automate functional, integration, and regression testing across the application programming interface ecosystem.
- Aug 2021Series D$225M
- Jun 2020Series C$150M
- Jun 2019Series B$50M
- Oct 2016Series A$7M
#8
Hasura 🦄Series C · San Francisco, California · founded 2013 · 69 employees$239.4Mraised▾
Developer of data access and AI integration software for businesses. It provides tools for accessing and utilizing data, along with AI integration capabilities. The company offers solutions designed to enable businesses to leverage their data for AI applications. Its products facilitate data accessibility and aim to improve AI implementation processes.
- Feb 2022Series C$100M
- Jan 2022Series C$102.8M
- Jul 2020Series B$25M
- Feb 2020Series A$9.9M
#9
Series D · San Francisco, California · founded 2011 · 248 employees$152.1Mraised▾
Apollo is an API transformation and validation tool. Offers technologies such as Apollo clients, Apollo engine, and Apollo server. Apollo Clients connects data to UI. Apollo Engine helps in infrastructure and tooling and provides features such as caching, performance tracking, and error tracking. Apollo Server translates existing REST APIs and backends into GraphQL. Apollo Server feature includes schema stitching, GraphQL subscriptions, one-step mocking, tracing, and cache control. Customers include Airbnb, Ticketmaster, OpenTable, KLM.
- Aug 2021Series D$130M
- Jun 2019Series A$22M
- 2011Seed$120K
#10
MuleSoft 🦄Series G · San Francisco, California · founded 2006 · 663 employees$259.3Mraised▾
Cloud based API management platform. It provides an integration solution for connecting application, data source, or API, in the cloud or on premise. The platform enables users to build, and test APIs in real time. It allows users to manage, monitor, and secure the APIs.
- 2016Series G—
- May 2015Series G$128.3M
- Mar 2014Series F$50.5M
- Apr 2013Series E$37M
#11
Seed · San Francisco, California · founded 2022 · 28 employees$14.9Mraised▾
Platform offering API management solution. It enables users to assign internal and customer-facing embeds for request logs, customer usage, key rotation, etc. It provides embeddable UI components that enable self-service support for API. Its features include usage tracking, request replay, request viewing, etc.
- May 2023Seed$11.6M
- 2022Seed$3.3M
#12
Series B · San Francisco, California · founded 2016 · 32 employees$50.4Mraised▾
Cloud-based API management platform. It provides a platform for building production-ready applications on top of APIs. It helps to compose disparate APIs by making use of the concept of relational databases. The platform abstracts away the details of specific API mechanics by allowing the user to express intent in a higher-level language of joins and filters, then translating that intent into a number of optimized API calls. It deals with all aspects of communicating with modern APIs, such as authentication, retries, caching, and optimized execution. The product is available on a subscription basis.
- Sep 2020Series B$35M
- Mar 2019Series A$12.2M
- 2017Seed$3.2M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of API Management coverage by sub-theme.
Regulatory-risk over time flat
Funding & growth over time
funding rising · growth rising
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.