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The developer API landscape is defined by the rapid growth of artificial intelligence. New companies are emerging to provide the essential tools for building AI-powered applications.
This trend is highlighted by companies like Kong, which has raised $344.1 million for its API platform. Similarly, AI voice startup ElevenLabs has attracted $281 million in funding since its founding in 2022.
Below is our list of 100 Developer APIs startups worth keeping an eye on.
Everything you need to raise funding for your startup, including 3,500+ investors, 7 tools, 18 templates and 3 learning resources.
Buy It For $97 $297 →Information about the industries, countries, and cities they generally invest in.
Get the Sheet for $50Information about their valuation, HQ's location, founded year, name of founders, funding amount and number of employees.
Get the Sheet for $50List of startup investors in the BioTech, Health, and Medicine industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50List of 250 startup investors in the AI and Machine Learning industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50List of 250 startup investors in the FinTech and Finance industries, along with their Twitter, LinkedIn, and email addresses.
Get the Sheet for $50ElevenLabs builds generative AI models and tools for advanced speech synthesis. Their platform allows creators and developers to generate lifelike audio, clone voices, and automatically dub content across multiple languages.
LangChain provides a popular open-source framework for developers building applications with large language models. Their tools help connect LLMs to other sources of computation or data, enabling the creation of more powerful and differentiated AI applications.
Solo.io develops cloud-native application networking solutions, including API gateways and service mesh. Their products are built on top of open-source technologies like Istio and Envoy, helping teams secure and scale their applications across any cloud.
SmartBear builds a suite of widely-used tools for software development and quality assurance. Their products help teams with everything from API design with Swagger to automated testing with TestComplete.
Kong creates a cloud API platform for developers to build, manage, and scale their APIs and microservices. Its core open-source gateway has become a popular choice for securing and managing API traffic with high performance.
Recall.ai builds a universal API that lets developers create bots for any meeting platform. Their tool provides a single point of access to real-time video and audio from services like Zoom and Google Meet, saving developers from building and maintaining multiple integrations.
Pangea builds a security platform that gives developers API-based services to embed directly into their generative AI applications. These security building blocks help teams ship secure AI apps faster and govern how AI is used within an organization.
Deepgram builds AI models that specialize in speech-to-text and audio intelligence. Their platform offers developers a suite of APIs for transcription, text-to-speech, and building voice agents.
Firecrawl offers a developer-first API that crawls any website and converts it into clean, structured data. Their service is designed to handle all the heavy lifting of data extraction, allowing engineering teams to easily build AI applications without worrying about web scraping.
Salt Security provides a dedicated API protection platform that uses AI to prevent attacks. Its technology automatically discovers all APIs and their data, allowing teams to find and fix vulnerabilities and stop active threats.
The ten companies we highlighted are just the start of the story. Across the board, founders are building new tools for AI and infrastructure, raising more than $2 billion combined to do it.
Some of these startups are brand new, while others have been growing for years. Here's a look at the rest of the companies building what's next for developers.
| Startup | Main Industry | Year Founded | Amount Raised | Last Funding Round |
|---|---|---|---|---|
| Automation | 2019 | $21.2M | Venture Round | |
| Security | 2021 | $41.3M | Venture Round | |
| AI | 2023 | $30M | Series A | |
| Infrastructure | 2013 | $220.7M | Venture Round | |
| Fintech | 2018 | $20.7M | Series A | |
| Security | 2002 | $125M | Private Equity | |
| Infrastructure | 2014 | $58.1M | Series B | |
| AI | 2023 | — | — | |
| Cloud | 2020 | $22.8M | Series A | |
| AI | 2024 | $20M | Series A | |
| AI | 2020 | $53.5M | Series B | |
| Analytics | 2008 | $263.9M | Venture Round | |
| Enterprise | 2018 | $92M | Series C | |
| Enterprise | 2018 | $57M | Series B | |
| Infrastructure | 2019 | $47.3M | Series B | |
| Cloud | 2018 | $49.5M | Series B | |
| Infrastructure | 2020 | $74.5M | Series B | |
| AI | 2022 | $28.5M | Venture Round | |
| Infrastructure | 2011 | $96.1M | Private Equity | |
| Analytics | 2017 | $4.5M | Angel | |
| AI | 2024 | $12M | Seed | |
| Infrastructure | 2020 | $68M | Series B | |
| Infrastructure | 2016 | $65M | Debt Financing | |
| Infrastructure | 2017 | A$46M | Series A | |
| AI | 2018 | $23.6M | Series A | |
| Infrastructure | 2016 | $152M | Venture Round | |
| Infrastructure | 2019 | $95M | Series B | |
| AI | 2021 | $375k | Pre-Seed | |
| AI | 2023 | $7.5M | Seed | |
| Analytics | 2019 | $24.7M | Venture Round | |
| Enterprise | 2021 | $3.4M | Seed | |
| Infrastructure | 2015 | $138.8M | Series C | |
| Infrastructure | 2021 | $30M | Series A | |
| Infrastructure | 2015 | $101M | Series C | |
| Data | 2019 | $7.9M | Series A | |
| Media | 2010 | $134.1M | Series E | |
| AI | 2020 | $34M | Venture Round | |
| Infrastructure | 2020 | $27M | Seed | |
| Infrastructure | 2018 | $52.5M | Series B | |
| Logistics | 2014 | $8M | Seed | |
| Analytics | 2019 | $46.7M | Series B | |
| AI | 2023 | $11.3M | Seed | |
| Infrastructure | 2023 | $3M | Pre-Seed | |
| Infrastructure | 2018 | $23.9M | Series B | |
| Cloud | 2014 | $79.9M | Series B | |
| AI | 2018 | $25.1M | Series A | |
| Crypto | 2020 | $93.8M | Initial Coin Offering | |
| Enterprise | 2015 | $31.9M | Series A | |
| Infrastructure | 2017 | $176.8M | Series C | |
| Enterprise | 2021 | $122.5M | Debt Financing | |
| Infrastructure | 2013 | $86.1M | Series B | |
| Cloud | 2015 | $2.8M | Corporate Round | |
| Infrastructure | 2012 | $172.5M | Series A | |
| AI | 2020 | $6M | Seed | |
| AI | 2015 | $2.9M | Grant | |
| Infrastructure | 2019 | $4.1M | Seed | |
| Infrastructure | 2019 | $85M | Series B | |
| AI | 2020 | $4.5M | Seed | |
| Hardware | 2014 | $40M | Series B | |
| Infrastructure | 2014 | $217M | Series D | |
| AI | 2014 | €23M | Series A | |
| Infrastructure | 2012 | $21.7M | Series B | |
| Infrastructure | 2021 | $25.4M | Series A | |
| Infrastructure | 2021 | $9M | Seed | |
| Infrastructure | 2007 | €92M | Private Equity | |
| Infrastructure | 2022 | $2M | Seed | |
| Infrastructure | 2019 | €10.5M | Seed | |
| AI | 2020 | $4.5M | Seed | |
| AI | 2021 | $1.4M | Pre-Seed | |
| Infrastructure | 2018 | $5.5M | Seed | |
| Fintech | 2022 | $6M | Seed | |
| AI | 2019 | $2.8M | Seed | |
| Cloud | 2018 | $4.8M | Pre-Seed | |
| Infrastructure | 2017 | $2M | Seed | |
| Fintech | 2019 | €600k | Seed | |
| Crypto | 2019 | $3.6M | Seed | |
| Data | 2013 | $28.5M | Series B | |
| AI | 2018 | €1.5M | Seed | |
| Fintech | 2018 | €3.2M | Seed | |
| Infrastructure | 2018 | $25M | Series A | |
| AI | 2015 | $150k | Seed | |
| Infrastructure | 2015 | €1.7M | Convertible Note | |
| AI | 2022 | €118k | Pre-Seed | |
| Infrastructure | 2017 | $1M | Seed | |
| Infrastructure | 2016 | DKK4.8M | Grant | |
| Infrastructure | 2020 | $50k | Pre-Seed | |
| Cloud | 2013 | €1.1M | Seed | |
| Media | 2017 | €20k | Seed | |
| Infrastructure | 1997 | — | — | |
| Retail | 2013 | — | — |
