D
DDeveloper Tools & APIs AI toolsFull list
Infrastructure, SDKs and model APIs.
42 tools27 with a free plan40 with an API8 open source
42 tools
DD
Freemium
D
AI translation for text, documents and voice, for individuals and businesses
TranslationFree planAPI
P
PP
Paid
D
DD
Paid
N
NN
Freemium
N
Visual workflow automation and AI agent builder, cloud or self-hosted
Workflow AutomationFree plan
S
SS
Freemium
S
Open image generation models you can self-host or call through an API
Image GeneratorsFree planAPI
M
MM
Free, from $9/mo
M
Visual no-code platform for building AI agents and automated workflows
Workflow AutomationFree planAPI
O
OO
Free, from $16.67/mo
O
Run open AI models locally or in the cloud on macOS, Windows and Linux
Local & Open ModelsFree planAPIOpen source
C
CC
Free
C
Open-source AI coding agent for your editor, terminal, desktop and apps
Code AssistantsFree planAPIOpen source
S
SS
Free
S
Free AI-powered search engine for scientific papers across all fields
Research AssistantsFree planAPI
R
RR
Freemium
R
Automatic image background removal for individuals, ecommerce and developers
Background RemovalFree planAPI
F
FF
Free, from $16/mo
F
Web search, scraping and crawling API that returns LLM-ready data
Browser Agents & ScrapingFree planAPIOpen source
B
BB
Freemium
B
AI agents and cloud browsers that automate web tasks for developers
Browser Agents & ScrapingFree planAPIOpen source
D
DD
Free trial
D
AI avatar videos and real-time conversational digital humans for businesses
Avatar & Talking-Head VideoAPI
M
Text, speech and document translation apps and API for people and businesses
Freemium
M
Freemium
M
Text, speech and document translation apps and API for people and businesses
TranslationFree planAPI
R
RR
Paid
R
Run, fine-tune and deploy open-source ML models through a cloud API
Developer Tools & APIsAPI
B
BB
Free, from $20/mo
B
Cloud headless browsers and web APIs for developers building AI agents
Browser Agents & ScrapingFree planAPI
P
PP
Free, from $99/mo
P
Managed auth and 10,000+ API tools for developers building AI agents
Developer Tools & APIsFree planAPI
R
RDeepfake detection for audio, video and images, with API and meeting protection
From $280/mo
R
From $280/mo
R
Deepfake detection for audio, video and images, with API and meeting protection
Security & FraudAPI
V
VV
Free, from $29/mo
V
Developer platform to build, test and deploy voice AI agents for phone calls
AI AgentsFree planAPI
W
WAI voiceovers from text using voices licensed from professional voice actors
Free, from $10/mo
W
Free, from $10/mo
W
AI voiceovers from text using voices licensed from professional voice actors
Text to SpeechFree planAPI
A
AA
Free
A
AI pair programming in your terminal for new and existing codebases
Code AssistantsFree planOpen source
W
WEnterprise platform to connect apps and data and govern AI agents and workflows
Free, from $100/mo
W
Free, from $100/mo
W
Enterprise platform to connect apps and data and govern AI agents and workflows
Workflow AutomationFree planAPI
A
AA
Freemium
A
Managed speech-to-text service on AWS for batch and streaming audio
TranscriptionFree planAPI
C
CC
Freemium
C
Localization platform for translating software, apps, games, websites and docs
TranslationFree planAPI
Developer Tools & APIs tools compared
From each vendor's own pages, re-checked every two months. Of 36 tools we checked, 9 of 16 that state a policy don't train AI on your content, and 18 hold SOC 2 or ISO 27001.
| Tool | MCP server | Official SDKs | Self-hosting |
|---|---|---|---|
| Nn8n | — | ||
| MMake | — | — | |
| FFirecrawl | — | — | |
| R | — | ||
| PPipedream | — | ||
| W | — | — | |
A Activepieces | — | ||
P Plus AI | — | — | |
T Tray.io | — | — |
— means the vendor's site doesn't say.
How to choose developer tools & apis tools
This category mixes model APIs, infrastructure and finished products that also offer an API, so start with the job you need done. Function narrows the list fastest: Anthropic, DeepSeek and Replicate provide access to models, Firecrawl and Browserbase give agents web access, Vapi handles voice agents for phone calls, and Pipedream and Activepieces connect apps.
Pricing model comes next. Semantic Scholar, Cline, Aider, whisper.cpp and Vosk are listed as free, while Resemble AI starts at $280/mo and Veridion asks you to contact them for pricing. Compare each plan against your expected usage.
Hosting and control matter if you want to run the software on your own infrastructure. Activepieces, Firecrawl, whisper.cpp and Vosk are open source and can be self-hosted, and n8n and Stable Diffusion also offer self-hosting.
Integration is the final check. Most tools here list an API, but Aider and n8n don't. Cline works in VS Code and JetBrains, while Aider runs in your terminal. We haven't tested these tools, so confirm the details with each vendor.
Frequently asked questions
Are there free developer tools and APIs?
Yes. Semantic Scholar, Cline, Aider, whisper.cpp and Vosk are listed as free. Many others are freemium, including DeepL, Amazon Transcribe, Firecrawl, Browserbase and Activepieces, so you can start without a paid plan and upgrade later.
How much do these tools cost?
Listed starting prices run from $5/mo for Rewind AI to $280/mo for Resemble AI. Others include Firecrawl at $16/mo, Anthropic at $17/mo, Vapi at $29/mo, Pipedream at $99/mo and Lokalise at $149/mo. Perplexity AI, DeepSeek and Replicate are paid but have no starting price in our listing, and Veridion asks you to contact them for pricing.
What should I look for in a developer tool or API?
Start with whether it does the specific job you need, such as serving models, scraping the web, transcribing speech or connecting apps. Then compare the pricing model, API availability, supported platforms, and whether you need an open-source or self-hosted option. Activepieces, Firecrawl, whisper.cpp and Vosk offer both of those last two.
What are the alternatives within each type of tool?
For language models, you can compare Anthropic and DeepSeek, or use Replicate to run open-source models. For speech-to-text, Amazon Transcribe is a managed AWS service, while whisper.cpp and Vosk can run offline. For workflow automation, Workato and Tray.io are aimed at enterprises, while Activepieces and n8n can be self-hosted. For AI coding, Cline and Aider are both open source.