80 Developer APIs companies in United States

80 Developer APIs companies in United States with 145 founders and decision-makers, led by San Francisco. 75 verified founder emails. Updated 2026-10-03.

Key findings

• FindMeMail tracks 80 Developer APIs companies in United States, with 145 founders and decision-makers listed.
• San Francisco is the top city, with 33 of them (41%), followed by New York (9).
• The most common team size is 1-10 employees (85% of companies).
• 22 (28%) were founded in the last three years.
• 21 have a recorded funding round; the most common is Seed (9).
• 44 companies (55%) have at least one verified founder email, 75 verified emails in total.

Breakdown

Top cities

• San Francisco: 33 (41%)
• New York: 9 (11%)
• Atlanta: 4 (5%)
• Dallas: 3 (4%)
• Palo Alto: 2 (3%)
• Newark: 2 (3%)
• Oakland: 2 (3%)
• Dover: 2 (3%)

Team size (employees)

• 1-10: 68 (85%)
• 11-50: 6 (8%)
• 501-1000: 3 (4%)
• 101-250: 2 (3%)
• 51-100: 1 (1%)

Latest funding round

• Seed: 9 (11%)
• Pre-Seed: 8 (10%)
• Undisclosed: 1 (1%)
• Corporate Round: 1 (1%)
• Convertible Note: 1 (1%)
• Venture - Series Unknown: 1 (1%)

Founded (last 10 years)

• 2017: 2 (3%)
• 2018: 1 (1%)
• 2019: 1 (1%)
• 2020: 5 (6%)
• 2021: 4 (5%)
• 2022: 3 (4%)
• 2023: 2 (3%)
• 2024: 4 (5%)
• 2025: 15 (19%)
• 2026: 3 (4%)

Recently added Developer APIs companies in United States

• Yardstick Insights — New York, United States: Yardstick Insights offers KPI benchmarking and valuation insights for fintechs, investors, and startup founders.
• user.cleaning — San Francisco, United States: Real-time API that detects disposable email addresses at signup. Helps SaaS products prevent free-tier abuse. Supports batch processing.
• Said Industries — San Francisco, United States: Defense intelligence technology for the missile defense era. Said Horizon, our first product, forecasts airstrikes and other attacks.
• EmitHQ — Las Vegas, United States: EmitHQ provides software tools that support communication workflows, focusing on email and messaging management for business use.
• Zavu — Dover, United States: Zavu is a developer-first unified messaging platform that allows teams to operate, and scale messaging across WhatsApp, SMS, and Email
• Shippy — Colorado Springs, United States: Shippy provides software that manages shipping workflows, order fulfillment, and carrier integrations for e-commerce businesses.
• KeiroLabs — San Francisco, United States: KeiroLabs builds a fast, affordable web search and scraping API designed for AI applications.
• ZettaQuant — Princeton, United States: ZettaQuant develops a software platform that provides artificial intelligence tools for financial data analysis and intelligence.
• Yomai — San Francisco, United States: Yomai is a SaaS platform that simplifies and accelerates SAP-to-Salesforce integration.
• Connect Trade — Chicago, United States: Connect Trade is a software company that provides API platform for accessing trading data and executing trades.
• Meeru AI — San Francisco, United States: Meeru AI is an AI operating system that provides financial intelligence platforms and ERP integration solutions.
• Stelrix — New York, United States: Spend without selling. A new credit(capital) card backed by your portfolio.
• NeuralQuantum.ai — Collierville, United States: AI + Quantum Computing for intelligent, real-time decision-making.
• OpenCoreOS — New York, United States: Review:OpenCoreOS develops open source core banking software and tools for digital financial services providers.
• CloudMatos — Livermore, United States: CloudMatos specializes in cloud security, intelligent remediation, self-healing cloud infrastructure, and governance solution.
• Guest Anywhere — Santa Monica, United States: GuestAnywhere provides cloud management, developer APIs, and software solutions for hospitality and IT management. Their mobile and point of sale services stre…
• Protocol — Dallas, United States: Building blocks for software developers.
• GraphQL — San Francisco, United States: GraphQL is a data query language and specification developed internally by Facebook.
• elink.io — San Francisco, United States: Simple, responsive, web pages for content curation in minutes.
• Browserless — Sheridan, United States: Browserless is a headless chrome browser as a service.
• Pathfix — Newark, United States: Integration Platform for OAuth and API Automation
• BigPicture — San Francisco, United States: Company APIs to convert domains and IP addresses into full company profiles for marketing, sales, or whatever else you dream up.
• Motionbox — San Diego, United States: Motionbox is a software company that develops AI tools for screen recording, video editing, GIF editors, and slideshow creation.
• Wit.ai — Palo Alto, United States: Wit.ai enables developers to build natural language experiences for bots, mobile apps, and smart home devices using voice and text interactions.
• restpack — Newark, United States: restpack is an online collection of RESTful Utilities-as-a-Service solutions.
• Pica — San Francisco, United States: Pica offers a tooling platform with APIs and SDKs to build, deploy, and manage AI agents that integrate third-party tools.
• Conductrics — Brooklyn, United States: Conductrics offers an API that allows users to create targeted, self-optimizing, customer-facing web and mobile applications.
• WireMock — Menlo Park, United States: WireMock is a popular tool for simulating APIs, allowing developers to test applications without dependencies and simulate edge cases.
• Short.io — Wilmington, United States: Short.io helps businesses engage a new audience and increase brand recognition.
• Listen Notes — San Francisco, United States: The best podcast search engine and database.

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Frequently asked questions

How many Developer APIs companies in United States are there?

FindMeMail currently lists 80 Developer APIs companies in United States with at least one founder or decision-maker identified. The count updates daily as new companies are added.

Where are most Developer APIs companies in United States based?

San Francisco (33), New York (9), Atlanta (4).

How do I contact founders of Developer APIs companies in United States?

75 verified founder emails are available for these companies on FindMeMail. Create a free account to get 50 free reveals, then buy one-time credit packs from $12.

Related reports

• Software companies in United States (3,675)
• Artificial Intelligence (AI) companies in United States (2,382)
• Seed-stage startups in United States (1,905)
• Information Technology companies in United States (1,861)
• Health Care companies in United States (1,647)
• E-Commerce companies in United States (1,545)
• SaaS companies in United States (1,304)
• Pre-seed startups in United States (1,096)
• Financial Services companies in United States (1,062)
• Manufacturing companies in United States (959)
• Consulting companies in United States (949)
• Internet companies in United States (824)

Methodology: counts include companies in the FindMeMail database with at least one identified founder or decision-maker. Data refreshes automatically as new companies are added.