M
MDeveloper Tools & APIs AI toolsFull list
Infrastructure, SDKs and model APIs.
42 tools27 with a free plan40 with an API8 open source
42 tools
MM
Freemium
M
Turn text prompts or images into textured, rigged 3D models for games and printing
3D & InteriorsFree planAPI
S
SS
Paid
S
AI music generator for royalty-free tracks for creators and music artists
Music GenerationAPI
A
AOpen-source workflow automation and AI agents with 770+ app integrations
Free, from $20/mo
A
Free, from $20/mo
A
Open-source workflow automation and AI agents with 770+ app integrations
Workflow AutomationFree planAPIOpen source
B
BLocal SEO platform for rank tracking, listings and reviews for businesses and agencies
From $31/mo
B
From $31/mo
B
Local SEO platform for rank tracking, listings and reviews for businesses and agencies
SEOAPI
P
PP
From $27/mo
P
Translation management and localization platform for teams, developers and LSPs
TranslationAPI
P
PP
From $10/mo
P
PTurns prompts, documents and URLs into branded, editable PowerPoint decks
Free, from $20/mo
P
Free, from $20/mo
P
Turns prompts, documents and URLs into branded, editable PowerPoint decks
PresentationsFree planAPI
R
RAI background remover for single images, bulk uploads and API workflows
Free, from $5.99/mo
R
Free, from $5.99/mo
R
AI background remover for single images, bulk uploads and API workflows
Background RemovalFree planAPI
R
RR
From $18/mo
R
Voice cloning, speech-to-speech and TTS for film, games, ads and creators
Voice CloningAPI
S
SS
From $18.99/mo
T
TT
From $50/mo
T
Enterprise iPaaS for integrations, automations, AI agents and governed MCP
Workflow AutomationAPI
L
LL
From $149/mo
S
SS
Freemium
S
Translation management platform with AI, machine and human translation
TranslationFree planAPI
S
SS
Free, from $21/mo
S
Local screen and audio recording that gives AI tools searchable context
Personal AssistantsFree planAPIOpen source
V
VV
Free
V
Open-source offline speech recognition toolkit for developers in 20+ languages
TranscriptionFree planAPIOpen source
M
MM
Contact
F
F
Free, from $39/mo
F
AI stock research terminal and financial data API for investors
AI Investing & Stock ResearchFree planAPI
V
VV
Contact
V
Continuously updated company data on 693M businesses for risk and sourcing teams
Data Analysis & BIAPI
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.