All Developer Tools

Fully managed RAG-as-a-Service platform handling document ingestion, chunking, indexing and retrieval across multimodal data for AI apps.

Railway — PaaS deploying apps and databases with autoscaling, private networking, and per-usage billing.

Embedded payments API for vertical SaaS platforms with seamless merchant onboarding.

Rainforest QA — QA-as-a-service platform combining AI and crowd testers for no-code E2E test creation and execution.

Rakutens wallet and in-app payment API — used by 90M Rakuten members, integrates with Rakuten Points.

Rakuten Mobiles carrier-grade SMS, OTP and omnichannel messaging APIs (Symworld CPaaS) for Japan.

Rancher — CI/CD for Applications tool for developers. Specializes in Kubernetes Management.

Ranorex — GUI test automation tool for web, desktop, and mobile apps using XPath-based object recognition.

Rapid7 InsightAppSec — Security Scanning / Mobile App Sec tool for developers. Specializes in Application Security.

RapidAPI — Developer Portals / API Management tool for developers. Specializes in api marketplace.

RapiDoc — open-source Web Component for rendering OpenAPI specs as interactive API reference documentation, embeddable in any web page.

Rapyd — Global fintech-as-a-service platform with local payment collection, payouts, issuing, and e-wallet APIs in 100+ countries.

Rasa — AI API / SDK for Developers tool for developers. Specializes in Conversational AI.

AI-driven subscription billing and B2B SaaS financing platform combining billing with flexible payment terms.

Rauthy — CI/CD for Applications tool for developers. Specializes in OpenID Connect SSO.

Ravelin — ML fraud detection platform using graph networks and machine learning to protect payments, accounts, and promotions.

RavenDB — CI/CD for Applications tool for developers. Specializes in Database.

Ray — CI/CD for Applications tool for developers. Specializes in Distributed Computing.

Raycast — Code Assistants / Agent Tooling tool for developers. Specializes in developer launcher.

Raygun — Application performance monitoring and crash reporting for web and mobile with user journey and error grouping.

Razorpay — Payment Gateway / PSP tool for developers. Specializes in payment processing.

RazorSQL — CI/CD for Applications tool for developers. Specializes in Database GUI.

re:infer — AI API / SDK for Developers tool for developers. Specializes in NLP Platform.

React Email — CI/CD for Applications tool for developers. Specializes in Email Development.

React Hook Form — CI/CD for Applications tool for developers. Specializes in Form Management.

React Native — Release / App Store Operations tool for developers. Specializes in Cross Platform Framework.

React PDF — CI/CD for Applications tool for developers. Specializes in PDF Rendering in React.

React Three Fiber — CI/CD for Applications tool for developers. Specializes in 3D Rendering for React.

react-dnd — CI/CD for Applications tool for developers. Specializes in Drag and Drop.

react-hot-toast — CI/CD for Applications tool for developers. Specializes in Toast Notifications.

react-i18next — CI/CD for Applications tool for developers. Specializes in Internationalization.

react-intl — CI/CD for Applications tool for developers. Specializes in Internationalization.

Open-source React Native in-app purchase library conforming to OpenIAP spec, using Nitro Modules for native bridging.

react-spring — CI/CD for Applications tool for developers. Specializes in Animation Library.

Read the Docs — CI/CD for Applications tool for developers. Specializes in Documentation.

Readable — Automated code documentation tool that generates comments and docstrings from code analysis.

ReadMe — Developer hub platform for API documentation with interactive explorer, changelogs, and per-user usage analytics.

Ready Player Me — Cross-game avatar platform with 3D character creation SDK for Unity and Unreal games.

Reality Defender — deepfake and synthetic media detection API for images, video, audio, and text.

RealUser — Real user monitoring platform capturing web performance metrics and user journey analytics from browser sessions.

Argentine payments orchestration and recurring billing platform for cross-country multi-currency revenue ops in LatAm.

Payment orchestration and subscription billing platform with global payments, KYC, and compliance.

Rebuff — Security Scanning / Mobile App Sec tool for developers. Specializes in LLM Prompt Security.

Bayesian marketing mix modeling platform for rigorous, statistically sound marketing performance insights.

Recharts — CI/CD for Applications tool for developers. Specializes in Charting Library.

Reclaim.ai — AI calendar optimization tool that auto-schedules tasks, habits, and meetings around existing commitments.

Reco.ai — Security Scanning / Mobile App Sec tool for developers. Specializes in SaaS/Identity Security.

Recombee — Recommendation engine API using collaborative filtering and content-based algorithms for personalization.

Recorded Future — Security Scanning / Mobile App Sec tool for developers. Specializes in Threat Intelligence.

Recraft AI — AI API / SDK for Developers tool for developers. Specializes in Image Generation.

Free open-source window manager for macOS with keyboard shortcuts and drag-to-snap — based on Spectacle.

Recurly — Enterprise subscription management platform with dunning, multi-gateway support, proration, and revenue recognition.

Red5 Pro — sub-500ms live streaming and WebRTC media server

Redash — Data Integration / ETL / Reverse ETL tool for developers. Specializes in Data Visualization.

Redis — CI/CD for Applications tool for developers. Specializes in In memory Database.

Redis cloud for queues — Redis Cloud managed service used as message broker for job queues with persistence options.

Redis Queue (RQ) — CI/CD for Applications tool for developers. Specializes in Task Queue.

RedisInsight — DBaaS / Serverless Databases tool for developers. Specializes in Database GUI.

Redocly — Developer Portals / API Management tool for developers. Specializes in API Documentation.

Redokun — Translation management tool for design and document files including InDesign, PowerPoint, and Excel.

Redox — Healthcare integration engine translating HL7, FHIR, and EDI messages across EHR and health tech systems.

Redox OS — CI/CD for Applications tool for developers. Specializes in Experimental OS.

Redpanda — Data Integration / ETL / Reverse ETL tool for developers. Specializes in event streaming.

RedPoint Global — Customer data platform with real-time decisioning and omnichannel marketing orchestration.

Vision-first document parsing and extraction API that converts PDFs, images and spreadsheets into LLM-ready structured JSON.

RedwoodJS — Backend-as-a-Service tool for developers. Specializes in full stack framework.

Refine — No-code / Low-code App Builders tool for developers. Specializes in React Admin Framework.

Refiner — Product Analytics tool for developers. Specializes in micro surveys.

TypeScript-first feature flag platform with self-cleaning flags. Agent automatically archives stale flags and generates GitHub PRs to remove obsolete code.

Reflect — No-code browser test automation tool with record-and-replay, version control, and CI integration.

Frontier AI lab building autonomous coding agents and foundation models, founded by ex-DeepMind researchers.

Reflex — No-code / Low-code App Builders tool for developers. Specializes in Python Web Framework.

Reflex Dev — CI/CD for Applications tool for developers. Specializes in Full Stack Reactive Framework.

LLM-powered data labeling and enrichment platform with purpose-built Refuel-LLM and open-source Autolabel Python library.

reg-suit — CI/CD for Applications tool for developers. Specializes in Visual Regression Testing.

AI sales engagement platform with prospecting agents, multi-channel outreach and workflow automation for GTM teams.

RegScale — Continuous compliance platform automating NIST, FedRAMP, CMMC, and DISA STIG control evidence collection.

Regula — Security Scanning / Mobile App Sec tool for developers. Specializes in IaC Security.

Reka AI — Multimodal LLM company offering Reka Core, Flash, and Edge models with vision and language capabilities.

Rekor — CI/CD for Applications tool for developers. Specializes in Container Registry.

Relativity6 — AI platform for small business underwriting using machine learning for risk assessment and classification.

Relay.app — CI/CD for Applications tool for developers. Specializes in Workflow Automation.

Environments-as-a-Service platform for creating ephemeral full-stack preview environments from pull requests.

Release Please — CI/CD for Applications tool for developers. Specializes in Release Automation.

release-it — CI/CD for Applications tool for developers. Specializes in Release Tooling.

ReleaseNotes.io — dedicated release notes publishing platform for software teams, with public changelog pages and subscriber notifications.

Relevance AI — AI API / SDK for Developers tool for developers. Specializes in AI Agent Platform.

Reliably — CI/CD for Applications tool for developers. Specializes in SLO Tracking.

AI website builder and Figma component library with 1000+ web design components. Combines AI site generation with a curated design system for Figma and Webflow.

Rely — CI/CD for Applications tool for developers. Specializes in Internal Developer Portal.

Rely.io — Developer Portals / API Management tool for developers. Specializes in Internal Developer Portal.

Mobile retargeting DSP helping app publishers re-engage existing users through programmatic advertising.

Remix — CI/CD for Applications tool for developers. Specializes in Web Framework.

Remote Development — Code Assistants / Agent Tooling tool for developers. Specializes in Remote Dev.

Render — Cloud platform for deploying web services, databases, cron jobs, and static sites with autoscaling.

Free, open-source graphics debugger for Vulkan, DX11/12, OpenGL, and Metal. Lets game developers capture frames, inspect GPU state, and analyse draw calls to fix rendering bugs.

Renovate — CI/CD for Applications tool for developers. Specializes in Dependency Updates.

Onchain UX toolkit (formerly WalletConnect) with AppKit and WalletKit supporting 400+ wallets across EVM, Solana and Bitcoin.

Replica Analytics — Privacy-preserving synthetic data generation platform for healthcare and financial datasets.

Replicache — CI/CD for Applications tool for developers. Specializes in Sync Framework.

Replicate — Cloud API for running ML models including image generation, LLMs, and audio processing via simple HTTP calls.

Replit — Browser-based coding environment with AI code generation, collaborative editing, and instant app deployment.

ReportLab — CI/CD for Applications tool for developers. Specializes in PDF Generation.

ReportPortal — CI/CD for Applications tool for developers. Specializes in Test Reporting.

Repro — Japanese mobile marketing automation platform with push, in-app messaging, and behavioral analytics.

Open-source fork of SpecFlow maintained by its original creators after Tricentis discontinued SpecFlow, fully compatible with .gherkin/.feature files.

RequestBin — CI/CD for Applications tool for developers. Specializes in Webhook Testing.

Requestly — Developer Portals / API Management tool for developers. Specializes in API Debugging.

Requests — CI/CD for Applications tool for developers. Specializes in HTTP Client.

Requests Library — CI/CD for Applications tool for developers. Specializes in HTTP Library.

Transport adapter that can mock out the Python requests library at the adapter level, useful for stubbing complex HTTP interactions.

Rerun — AI API / SDK for Developers tool for developers. Specializes in visualization.

Resemble AI — AI API / SDK for Developers tool for developers. Specializes in Voice Cloning.

Resend — Developer-first transactional email API with React Email support, webhooks, and domain management.

Resgate — CI/CD for Applications tool for developers. Specializes in Real time API.

Resistant AI protects fintechs and banks from document forgery, synthetic identity and sophisticated transaction fraud using adversarial-robust machine learning. Its APIs analyze PDF bank statements, IDs and transaction streams to score ris

Resmo — Asset and configuration tracking platform querying AWS, GCP, GitHub, and SaaS environments for security posture.

Resourcely — CI/CD for Applications tool for developers. Specializes in Infrastructure Guardrails.

Respan — AI code refactoring and documentation assistant that analyzes and rewrites codebases for clarity.

RespectASO — free open-source ASO keyword research tool for iOS, self-hosted via Docker with optional agentic AI for metadata correction and no required API keys or accounts.