Mark Smith
This article showcases our top picks for the best San Francisco based Developer APIs companies. These startups and companies are taking a variety of approaches to innovating the Developer APIs industry, but are all exceptional companies well worth a follow.
We tried to pick companies across the size spectrum from cutting edge startups to established brands.
We selected these startups and companies for exceptional performance in one of these categories:
- Innovation
- Innovative ideas
- Innovative route to market
- Innovative product
- Growth
- Exceptional growth
- Exceptional growth strategy
- Management
- Societal impact
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Top San Francisco Developer APIs Startups
Data sourced from Crunchbase and SemRush.
Nylas
Crunchbase Website Twitter Facebook Linkedin
Nylas is an API platform that helps developers build features that connect to every email, calendar, and contacts provider in the world.
Algolia
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Algolia is the Search-as-a-Service platform that enables companies to deliver fast and relevant digital experiences that drive real results.
RevenueCat
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RevenueCat is a mobile subscription toolkit that makes it easy to build and manage in-app purchases and subscriptions.
Mux
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Mux is a video platform designed to make video streaming and analytics possible for every development team.
Extend
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Extend provides extended warranties as a service to merchants and innovates the broken customer experience associated with them.
MuleSoft
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MuleSoft provides an integration and API platform that makes it easy to connect data from any system to create connected experiences.
Checkr
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Checkr seeks to automate the process of professional background checks.
SightCall
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SightCall is a live video SaaS enabling visual support for enterprises enriched by Augmented Reality and Artificial Intelligence insights.
Kong
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Kong is the cloud-connectivity company offering the industry-leading service connectivity platform designed for modern architectures.
Lob
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Lob provides direct mail and address verification APIs which allows businesses to send personalized mail to their customers.
RapidAPI
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RapidAPI is an API marketplace that enables developers to find and connect to APIs.
Merge
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One API to integrate with all HR, payroll, recruiting, and accounting platforms.
OPSWAT
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OPSWAT protects critical infrastructure by enabling the safe transfer of files and devices to and from secure environments.
Deepgram
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Deepgram is a technology startup that develops an enterprise-focused automatic speech transcription and analysis platform.
Treasury Prime
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Treasury Prime is a Banking-as-a-Service company that connects banks and FinTechs through an API.
Womply
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A local commerce platform that provides apps, APIs, marketing, and financial tools for over 500,000 American businesses.
Apollo
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Apollo is the GraphQL company. Its Data Graph Platform helps developers, startups, and enterprises get the most out of GraphQL.
Clearbit
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Clearbit develops business intelligence to help companies find more information of customers in order to increase sales and reduce fraud.
HelloSign
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HelloSign offers fast, secure, and legally binding eSignatures for businesses.
Tetrate
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Tetrate provides enterprise-ready service mesh for all workloads and all environments.
Unit21
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Unit21 is a platform that provides no-code tools and services for risk and compliance teams.
PubNub
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The PubNub Data Stream Network enables mobile and web developers to build and scale realtime apps.
Courier
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The fastest way for developers to build notifications for their app. Email, SMS, push, chat, and more.
Pachyderm
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Pachyderm is an enterprise-grade data science platform that makes explainable, repeatable, and scalable AI/ML a reality.
Token Transit
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Token Transit is a provider of a mobile ticket booking application intended to help riders pay for transit via a mobile application.
WorkOS
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WorkOS provides APIs to make applications enterprise-ready, with pre-built features and integrations required by IT admins.
Firebase
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Firebase is Google’s mobile platform that develops apps that grow users base on iOS, Android, or the Web.
Aquarium
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Aquarium is expertise in making machine learning accessible to its customers that helps to simplify their models by improving datasets.
MonkeyLearn
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MonkeyLearn is a Text Analysis platform with Machine Learning to automate business workflows and save hours of manual data processing.
Kover
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Kover develops micropremium products for consumers’ everyday pain points.
Stytch
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Stytch improves security and user experience with passwordless authentication.
ReadMe
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ReadMe provides every company the ability to quickly create beautiful documentation, and build loyal, productive developer communities.
Plivo
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Plivo is a leading cloud communication platform that helps companies quickly program voice and SMS capabilities into their applications.
Alchemy
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Alchemy is a developer platform that helps companies to build reliable decentralized applications.
Postman
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Postman is the collaboration platform for API development.
Wage
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Verix is a seamless APIs for real-time income and employment verification.
Pixie
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At Pixie Labs, we build machine intelligence systems which empower developers to engineer the future.
Nexmo
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Nexmo provides innovative communication SMS and Voice APIs that enable applications and enterprises to easily connect to their customers.
Citadel – Payroll APIs
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With Citadel, users can easily connect their payroll account and instantly verify employment, income, and identity.
DeepSource
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Deepsource is an enterprise tech startup that provides an automated tool to review codes.
Automate.io
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Use tens of cloud apps? Connect them the way you want. Sync data, automate workflows – marketing, sales and more.
Stronghold
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Stronghold creates virtual payment networks that give developers access legacy and next-generation payment networks through a simple API.
Swiftype
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Swiftype is a provider of SaaS-based site and enterprise search platform used to fully customize the search experience on websites.
Apisec.ai
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Apisec.ai is an enterprise-class API security management platform that delivers instant and continuous API security coverage and compliance
BetterDoctor
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BetterDoctor, a technology company, delivers provider directory data and has a database that can be accessed through a responsive API.
Autocode
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An online code editor with API autocomplete, instant hosting, and a Standard Library. Sync data, build bots and customize workflows.
Airbrake.io
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Airbrake is an error tracking company that collects and aggregates errors in web apps for developers.
Apiary
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Apiary provides tools that help companies build, test, monitor, and document web APIs.
Apres
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Apres is an analytics platform built to scale and explain AI decision making.
Upcall
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Upcall is the human-powered outbound sales & marketing calling platform.
Mashery
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Mashery is a TIBCO company providing API management services that enable companies to leverage web services as a distribution channel.
Authy
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Authy provides an API for developers to customize the user experience when adding two-factor authentication and multiple add-ons for apps.
ModernTax
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ModernTax is API platform that democratizes access to tax records for business services companies.
Timekit
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Timekit empowers developers and designers through a set of unified APIs that deliver the entire booking infrastructure.
Kimono Labs
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Kimono Labs is an online platform that allows its users to convert their websites into APIs.
Jido Maps
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Jido Maps is a software company that offers an API for persistent augmented reality.
Runscope
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Runscope develops tools that support the modern application development life cycle.
Grokstyle
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Grokstyle develops an app that automatically identifies furniture and home decor from just about any picture or angle.
Seam
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Seam is an API for developers to control homes and buildings.
isocket
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isocket offers a technology platform that is focused on buying and selling fixed price inventory.
Agnitus
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Agnitus is a developer of touch-enabled learning applications.
Protonet
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Protonet provides a cloud-based social project management and collaboration platform.
Bitext
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Bitext develops the most accurate multilingual text analysis engines in the market such as middleware for chatbots and lemmatization.
Driven, Inc.
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Driven, Inc. is the industry leader in Big Data application development and performance management solutions.
3scale
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3scale’s API management platform empowers API providers to easily package, distribute, manage and monetize APIs.
OneID
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OneID is an identity and security platform for the IoT and web connected world, including devices, servers, applications, and humans.
Berbix
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Berbix develops identity verification software that uses machine learning techniques to instantly spot fraud.
Lang API
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LangAPI exists to help developers rapidly translate and localize their apps for users worldwide.
Hannah Systems
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Partnering with cities to deliver the next generation of open and ethically managed traffic data.
VoiceLayer
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Real-time Push-to-Talk PaaS Add realtime Push-to-Talk (PTT) to any app with our simple API/SDK! Push-to-Talk: Messages are streamed rea
Pepper
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Pepper provides an API that helps health, food, insurance, and technology companies build better user experiences.
Crunchbase Website Twitter Facebook Linkedin
TeleSocial is an integrated voice and IP service that connects voice calls through social media.
Guidebox
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Guidebox is the data layer that powers universal search and discovery for movies and TV across the OTT landscape.
Basilica
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Basilica is an API that embeds high-dimensional data like images and text.
Bitbutter
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Crypto-asset account aggregation API for fintechs and financial institutions.
RingCaptcha
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RingCaptcha provides SMS and voice verification services, as well as SMS traffic analytics, monitoring and anti-fraud protection.
Dacast
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Dacast offers API-based and easy-to-use streaming solutions to host, manage, monetize and deliver OTT video worldwide.
AssemblyAI
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AssemblyAI is an applied artificial intelligence company that uses deep learning technology to develop practical products.
