130 tools in Coding & Development with a free plan, as shown on each vendor's own pricing page. 98 of them were read and verified on the vendor's page; the rest carry their check status so you can see how sure we are.
Listed A to Z, not ranked. A free plan usually has limits (credits, watermarks, exports); the line under each price says what we found. Free trials are not counted as free plans. Checked up to 11 Nov 2026.
No-code builder for mobile and web apps with an AI app generator, drag-and-drop screens and a hosted database. Publish to the App Store, Google Play or a custom domain on paid plans.
Open-source (MIT) workspace for building AI coworkers and agents that run in Slack, web embeds and on schedules, with traces and cost tracking. Cloud plans use credits and have no per-seat price.
From $29/mo (Starter)Free plan: 500 credits (one time)
Managed RAG platform: connect your documents and get retrieval through an API, SDKs and hosted search. Priced by pages processed, with extra connectors billed separately.
From $49/mo (Pro)Free plan: 10,000 retrievals per month
Turns plain-English questions into SQL, runs it read-only on your own database, and explains, fixes and optimizes queries. Paid plans start with a 7-day trial that needs a card.
Open-source AI pair programming tool that runs in your terminal and edits code in your git repo. Free under Apache 2.0; you pay only for the LLM API you connect.
Open-source low-code platform for building internal tools and admin panels on your databases and APIs, with AI assistance in the editor. Self-host the Community edition free or use the cloud.
AI agency and coding platform that builds and runs apps from a description, plus an OpenAI-compatible API. Free monthly tokens, then token-credit plans priced by how many apps you run.
AI assistant from Anthropic for chat, writing, analysis and coding help, with a free tier and paid tiers that raise usage limits. Pro includes the Claude Code coding tool.
Finds and fixes data and label errors in datasets, and offers a Trustworthy Language Model that scores how reliable an LLM answer is. TLM is pay-per-token after free tokens.
Open-source AI coding agent for VS Code, JetBrains and the terminal. The extension is free; you pay only the model provider for usage. Enterprise adds SSO, audit logs and support.
AI optimizer that finds faster versions of your Python, JavaScript, TypeScript and Java code, benchmarks them and opens verified pull requests on GitHub.
From $20/mo (Pro)Free plan: 25 optimizations per month
AI coding assistant from Zhipu and Tsinghua researchers with code completion, translation, comment generation and Q&A in popular IDEs. Open model and API.
Cloud development environments and sandboxes you can run in the browser, plus an SDK for running code from AI agents. VM runtime is measured in credits.
From $170/mo (Scale)Free plan: 40 VM hours per month
Enterprise language-model API (Command family) for RAG, agents and multilingual apps. Free trial keys for testing; production keys are billed per million tokens.
MCP server from Upstash that feeds current library documentation into Cursor, Claude Code, Windsurf and other AI coding tools so the model stops using stale APIs.
Open-source AI code assistant for VS Code and JetBrains that lets you plug in any model and build custom agents. Use your own API keys for free or a flat-fee Models Add-On.
Code editor built around AI agents and autocomplete. A free Hobby plan has limited usage; paid plans add larger usage pools for different model groups.
Collaborative cloud notebook for Python and SQL with an AI agent that writes and fixes code, builds charts and schedules runs. Paid seats are charged per editor; viewers are free.
Free text-to-diagram tool from Eraser that turns prompts or code into technical diagrams. The full Eraser app adds AI credits, maps, Git and data sources, priced per member.
From $60/mo (Business)Free plan: 3 AI credits (one time)
Builds and maintains documentation, specs and agent memory from your repos, issues and chats so coding agents keep context. Free for public repositories.
Web search API built for AI agents. It runs its own index and returns ranked pages with text and highlights in one call. Pay-as-you-go with no subscription; search starts at $4 per 1,000 requests.
Paid price not foundFree plan: 10 dollars in credits per month
Desktop Git client with virtual branches, stacked pull requests and AI-written commit messages. The client is free for individuals; paid plans add cloud features and team seats.
AI coding assistant that works inside code editors and on GitHub. Individual plans bundle code completions with a monthly balance of AI credits for chat and agent features.
From $10/mo (Pro)Free plan: 2,000 code completions per month
Builder for internal business apps from a spreadsheet, prompt or file. The current product is GlideOS (credit based); the older Glide Classic is priced separately.
Free desktop app from Nomic that runs open-source chat models on your own laptop with no internet, plus LocalDocs for chatting with your files. No account or key needed.
AI code reviewer that reads your whole codebase and comments on pull requests. Pro has no seat fee: you pay per credit, shared across the organisation.
Fast AI inference cloud (GroqCloud) with an OpenAI-compatible API for open models and Whisper speech-to-text. The free tier is for testing; the Developer tier is pay-as-you-go per token.
Open-source LLM observability and gateway: log, monitor and debug AI app requests with a one-line proxy change. Flat monthly plans, plus usage-based fees for requests and storage above the included amounts.
From $79/mo (Pro)Free plan: 10,000 requests per month
Test automation platform: Katalon Studio IDE with AI script generation, TestOps for test management, and TestCloud for cloud browsers and devices. Sold per seat.
Open-source AI coding agent for VS Code, JetBrains and the CLI with 500+ models. Individual use is free; you pay model providers at cost, or use Kilo credits and an optional Kilo Pass.
Runtime security for LLM apps and agents: detects prompt attacks, data leaks and unsafe content through one API. Now sold as Check Point AI Guardrails.
Paid price not foundFree plan: 10,000 screening requests per month
Cloud workspace from the PyTorch Lightning team for coding, training and serving AI models on rented GPUs. Each plan bundles monthly compute credits; extra GPU time is billed by the second.
LlamaCloud (LlamaParse) is a paid document-parsing and indexing platform from the LlamaIndex team. The LlamaIndex framework itself is open source and free.
Open-source TypeScript framework for building AI agents, with a paid platform for deploying and observing them. Starter is free; Teams is $250 a month.
Mistral's AI chat and agent for work and code, formerly called Le Chat. A free plan is available; Pro and Team raise limits and add the Vibe coding agent.
Web hosting and deployment platform with Git deploys, serverless functions and a global CDN. Plans include monthly credits that cover deploys, compute, bandwidth and requests.
From $9/mo (Personal)Free plan: 300 credits per month
Tool for running open AI models on your own computer, with an optional cloud for larger models. Local use is free and unlimited; cloud plans include a monthly pool of usage credits charged per token.
Open-source (MIT) platform for AI software-engineering agents. Agent Canvas is free to self-host with your own LLM key; Teams adds multi-user identity and SSO; Enterprise adds unlimited seats and support.
One API for 600+ AI models from many providers, with routing and failover. You buy credits and pay each provider's list price with no markup; OpenRouter charges a fee on credit purchases.
Paid price not foundFree plan: 50 requests on free models per day
AI gateway and observability layer: one API for many LLM providers, with routing, fallbacks, caching, logs and prompt management. Portkey is now branded Prisma AIRS AI Gateway.
From $49/mo (Production)Free plan: 10,000 logs per month
Open-source tool for testing and red-teaming LLM apps: run evals, compare prompts and models, and scan for vulnerabilities from the command line. Enterprise adds a hosted dashboard, team controls and on-prem deployment.
AI code review for pull requests on GitHub, GitLab, Bitbucket and Azure DevOps, with team rules and codebase context. Pro Team is paid with pooled credits.
From $30/mo (Pro Team)Free plan: 30 PR reviews per month
App hosting platform: deploy services and databases from Git or a template. A flat plan fee covers an equal amount of usage, billed per second on CPU, memory, storage and egress.
From $5/mo (Hobby)Free plan: 1 USD of usage per month
Cloud platform to host web services, static sites, workers, cron jobs and databases. A workspace plan is billed flat, with compute billed per second on top.
AI-assisted static code security testing (SAST) from Snyk, with real-time IDE scanning. Sold inside Snyk's Free, Team and Enterprise plans alongside open-source, IaC and container scanning.
From $25/mo (Team)Free plan: 100 Code tests per month
StackBlitz makes Bolt, an AI app builder that writes and runs full-stack code in the browser. Plans are token allowances; unused tokens roll over for up to two months.
From $30/mo (Teams)Free plan: 1,000,000 tokens per month
AI code autocomplete with a 1M-token context window. Supermaven was sunset after its acquisition: no new paid plans, and existing users keep free autocomplete.
Open-source, self-hosted AI coding assistant with code completion, chat and an answer engine. Community edition is free; Team and Enterprise add SSO, analytics and support.
Open-source desktop app that runs coding agents such as Claude Code and Codex side by side with shared plans and reviews. It is free for individuals; a Sync plan adds team-wide task sharing.
Open-source toolkit for fine-tuning and running open LLMs on your own hardware, now with a free no-code desktop app. An older pricing page lists Pro and Enterprise tiers for multi-GPU and multi-node speedups.
Vercel's AI tool that turns a prompt into web UI and apps (React and Tailwind) you can deploy to Vercel. Usage is billed as credits that are spent by tokens.
Open-source (MIT) framework for asking questions of your database in plain language, with an optional hosted cloud. Cloud plans are priced by questions per day.
