Recently added
9 of 424- Free tier $2.00 / mo FTV 47
AgentMail
AgentMail is an email inbox API for AI agents. It provides programmatic creation and management of email inboxes, threads, replies, attachments, realtime events, custom domains, semantic search, and data extraction through REST APIs, SDKs, webhooks, and MCP support.
- Free trial $3.00 / mo FTV 20
tickgit
tickgit is a code-based project management tool that scans repositories for TODO comments and surfaces them as trackable work items. It uses plain-text code comments and git rather than a separate project management system.
- Free tier $2.00 / mo FTV 47
Flock
Flock is a team messaging and collaboration platform with channels, direct messages, voice and video calling, file sharing, to-dos, polls, reminders, and integrated search. It provides desktop apps for Windows, Mac, Linux, and Chrome, plus web access through the Flock service.
- Free tier $20 / mo FTV 49
Othor AI
Othor AI is a business intelligence platform that connects to data sources such as databases, spreadsheets, and cloud services, then generates dashboards, narratives, charts, and reports from that dat...
- Free credit $5 credit FTV 28
ngrok
ngrok is an all-in-one cloud networking platform that provides secure tunnels, API gateway routing, traffic policy, and observability for services running anywhere. It can expose localhost or private ...
- Free tier $2.00 / mo FTV 43
cron-job.org
cron-job.org is a hosted cron job scheduler that executes HTTP requests for websites and scripts at configured intervals, from once per minute up to once per year. It supports custom request methods, ...
- Free tier $4.00 / mo FTV 55
Permit.io
Permit.io is an authorization platform for apps, APIs, data, and AI agent workflows. It provides policy enforcement through a policy engine and PDPs, with support for RBAC, ABAC, ReBAC, and PBAC, plus GitOps, SDK, API, and Terraform-based policy management.
- Free tier $5.00 / mo FTV 56
Mouseflow
Mouseflow is a behavior analytics platform that records user sessions, generates heatmaps, tracks journeys, and detects friction across websites. It captures clicks, scrolls, mouse movement, form inte...
- Free tier $25 / mo FTV 56
Engagespot
Engagespot is a notification infrastructure platform for developers. It provides a single API for sending in-app, email, push, SMS, Slack, Discord, WhatsApp, and webhook notifications, along with templates, workflows, provider management, logging, and a built-in real-time in-app inbox.
Categories
42 total- Category
AI Tools
Large language models, AI assistants, machine learning platforms and AI-driven content tools.
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APIs & Integrations
API gateways, message queues, integration platforms and data-transformation APIs.
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Analytics
Product analytics, web analytics and customer-behaviour platforms.
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Auth & Identity
Authentication, identity-as-a-service, secrets management and access-control platforms.
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Background Jobs
Async job runners, queues, schedulers, cron, and workflow orchestrators for work that happens after a request returns.
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CDN & Networking
Content delivery networks, load balancers, DNS services and connectivity platforms.
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CMS
Headless and traditional content-management systems.
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CRM
Customer relationship management platforms.
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Cloud Hosting
Application hosting, container platforms, BaaS providers and managed compute environments.
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Data Integration
ETL, data import and pipeline tools that move data between systems.
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Databases
Managed databases, key-value stores, vector stores and search-optimised data services with free tiers.
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Design Tools
Visual design, diagramming, data-visualisation and design-to-code tooling.
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DevOps
CI/CD, deployment automation, container build systems and feature-flag platforms.
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Developer Tools
IDEs, code editors, container registries, CLI tooling and other developer-productivity utilities.
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Documentation
Developer documentation hosts, API doc tools and knowledge-base builders.
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Education
Free services in the Education category.
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Email
Transactional email, email APIs and email-delivery infrastructure.
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Financial Data
Market data APIs, currency rates and personal-finance planning tools.
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Forms
Form builders, surveys and structured data-collection tools.
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Game Development
Free services in the Game Development category.
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Image Processing
Image CDNs, on-the-fly transforms, optimisation pipelines, and uploaders that take a source asset and serve a fast variant.
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Infrastructure as Code
Terraform, Pulumi and other declarative infrastructure tools.
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Knowledge Management
Wiki, knowledge-base and personal knowledge-management platforms.
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Marketing Automation
Email marketing, drip campaigns and marketing automation suites.
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Monitoring & Observability
Application monitoring, log management, uptime checks and incident-response tooling.
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Music & Audio
Music generation, audio processing and voice tools.
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Presentation Tools
AI presentation generators, slide-deck templates and presentation-authoring tools.
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Productivity
Notes, documents, knowledge management and personal-productivity apps for individuals and teams.
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Project Management
Issue tracking, kanban boards and broader work-management platforms.
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Realtime & Messaging
WebSocket APIs, pub/sub, presence, and collaborative-editing infrastructure for pushing live updates to clients.
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SEO Tools
Search-engine indexing, audit and ranking tools.
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Search
Search-as-a-service, vector search and discovery platforms.
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Security
Free services in the Security category.
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Serverless & Compute
Serverless functions, virtual machines and the lower-level compute primitives that everything else runs on.
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Storage
Object storage, archival storage, block storage and managed media-processing buckets.
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Subscription Management
Recurring-billing, usage-metering and subscription-lifecycle platforms.
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Telephony & SMS
SMS, voice, and programmable telephony APIs - send messages, place calls, and build communication into apps.
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Testing & QA
Cross-browser testing, end-to-end test runners, visual regression, and other quality-assurance tooling for shipping with confidence.
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Version Control
Git hosting, source-code repositories and code-collaboration platforms.
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Web Scraping
Web scraping APIs, browser automation and structured data-extraction tooling.
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Website Builders
No-code site builders, internal-tool builders and low-code app platforms.
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Whiteboarding
Collaborative whiteboards and visual ideation tools.
Types
5 total- Type
Always free
29 products - Free forever - no time limit, no usage cap that forces a switch to paid.
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Free tier
343 products - Permanent free plan alongside paid tiers.
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Intro tier
9 products - Generous allowance for new accounts that drops after the intro period.
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Free trial
15 products - Time-limited trial of an otherwise paid product.
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Free credit
28 products - One-time signup credit that pays for usage until exhausted.
Companies
19 total- Company
Abstract API
Abstract API offers a set of REST APIs for common infrastructure tasks: email validation, exchange rates, IP geolocation, website screenshots, and web scraping. For builders, the appeal is breadth with a low-friction interface. The email tool helps cut bounce rates and clean signups. The exchange rate API covers live and historical currency data, including fiat and crypto. IP geolocation adds location and security context to requests. Screenshot capture turns URLs or HTML into images for previews and QA. The scraping API rounds out the stack for structured data extraction. Several products include a free tier, making it easy to try production-style workflows without immediate spend.
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Amazon Web Services
Amazon Web Services is a cloud platform with a broad set of developer services, from compute and storage to databases, messaging, identity, and delivery. Its free tiers are useful because they let builders assemble real workloads without paying upfront for every layer. DynamoDB, CloudFront, Cognito, SNS, X-Ray, Step Functions, CodePipeline, and Amazon Q Developer all offer entry points for testing, prototyping, and small production apps. Compared with peers, the appeal is breadth: you can try a database, CDN, auth, CI/CD, tracing, and workflow orchestration inside one ecosystem. For teams already building on AWS, the free tier can cover the early phases of an application stack.
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Atlassian
Atlassian makes cloud tools for code hosting, project tracking, documentation, incident comms, and team collaboration. The free tiers are useful because they cover several core builder workflows without forcing an early upgrade. Jira’s free plan supports up to 10 users with issue tracking, boards, dashboards, and limited automation. Bitbucket adds private Git repos plus pull requests and Pipelines, with a small-cap plan that includes workspace storage and build minutes. Confluence and Trello give teams a place to document work and organize tasks, while Loom and Statuspage cover async updates and incident messaging. It is a broad stack, but the free offerings are strongest for small teams that want connected tools from planning through delivery.
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BrowserStack
BrowserStack is a cloud testing platform for web and mobile apps that gives developers access to real desktop browsers and real iOS and Android devices. It covers manual testing, automation, visual testing, accessibility checks, and reporting, which makes it useful for teams that want to test against real environments rather than emulators. Its free tier is notable because it is not just a trial. The pricing page includes concrete free offerings, including a Freelancer plan with 100 minutes of Live or App Live, plus Percy Free for visual testing with 5,000 screenshots. For builders, that combination offers a practical way to validate releases, catch UI regressions, and explore cross-device coverage without paying upfront.
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Cloudflare
Cloudflare provides a connectivity cloud for websites, applications, and networks, with tools for CDN, DNS, security, serverless compute, storage, and edge data services. Its free tier is notable because it goes beyond a basic website plan: developers can use Workers for edge functions, Pages for static and Jamstack sites, D1 for SQLite-style serverless databases, R2 for object storage without egress fees, and Queues for background jobs. For builders, that means a real path from frontend hosting to APIs, persistence, and async processing without stitching together multiple vendors. The free plan also includes core performance and protection features that make it useful for personal projects and early-stage apps.
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DigitalOcean
DigitalOcean sells cloud infrastructure and developer tools for building, deploying, and watching applications. Its free offerings cover several parts of that stack: App Platform for managed web apps, APIs, worker services, and static sites; Functions for serverless code; Uptime for endpoint monitoring and alerting; and a private container registry for image storage. Paperspace by DigitalOcean adds GPU and machine learning infrastructure, with a free Gradient plan that keeps public projects available but comes with clear limits. For builders, the appeal is not a token trial but a set of usable free tiers that support early development, lightweight production, and basic observability in one ecosystem.
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Docker
Docker provides the container platform many teams use to build, test, ship, and run software consistently across environments. Its free tier is useful because it covers core container workflows rather than a thin trial: local development tools, image distribution, and access to parts of the broader ecosystem for modern app delivery. For builders, the main draw is the ability to work with containers without paying upfront, while also tapping into Docker Hub’s free catalog of hardened images. That gives teams a way to start with secure, minimal base images and packaged components for common runtimes and infrastructure pieces, which can reduce setup work compared with assembling everything from scratch.
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Firebase
Firebase bundles managed building blocks for web and mobile apps: static hosting, serverless functions, and two NoSQL databases for syncing data in real time. Its free tier is useful because it lets developers prototype a full stack without stitching together separate vendors, with hosting on a global CDN, HTTPS, preview channels, and rollback support, plus event-driven backend logic and realtime storage. Cloud Firestore and Realtime Database cover different data models, while Cloud Functions handles server-side work without servers. Compared with many starter plans, the appeal is breadth: enough to launch and test an app, not just a landing page.
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GitHub
GitHub is a code hosting and collaboration platform built around repositories, pull requests, issues, code review, project planning, automation, and security tooling. For builders, the free tier is appealing because it covers the basics of software delivery in one place, with enough room to manage projects, review code, and ship small tools without paying up front. It also stands out for offering GitHub Pages, an always-free static site host for publishing sites directly from a repository. Compared with narrower source control tools, it combines version control, team workflows, and lightweight deployment in a single workflow, which makes it useful for solo developers and small teams alike.
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Google
Google’s free offerings span cloud infrastructure, authentication, notebooks, and consumer AI. For builders, Google Cloud’s signup credit and limited always-free usage are the main draw, giving new projects room to test compute, storage, and managed services before paying. Firebase Authentication adds a generous identity layer for apps, with email/password, social logins, and account linking at no charge within its free tier. Colab is a browser-based Python notebook with free access to hosted runtimes and occasional GPU or TPU availability, useful for prototyping and research. Gemini rounds out the stack with a free chat assistant for writing, planning, and analysis, making Google unusually broad across both app development and everyday workflow tools.
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HashiCorp
HashiCorp makes infrastructure software for provisioning, image building, and secrets management. Its free offerings give builders access to tools used across the stack: HCP Terraform for coordinating Terraform workflows in a shared cloud environment, Packer for creating consistent machine images from a single template, and Vault for identity-based secrets management with credits to explore. That mix is useful because it covers day-to-day infrastructure automation as well as security and release hygiene, without forcing teams to adopt separate point tools. Compared with many free tiers that stop at a sandbox, these products let developers work with real workflows, then scale into more governed operations as needs grow.
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Microsoft
Microsoft offers a broad cloud stack for building and operating applications, with Azure App Service, Azure Functions, virtual machines, and Entra ID in the mix. For developers, the free or introductory tiers are useful because they cover the basics of hosting web apps, running event-driven code, spinning up Linux or Windows VMs, and handling identity and access control without immediate spend. App Service and Functions reduce the need to manage servers, while Entra ID gives teams a way to test single sign-on and multifactor authentication. Compared with many cloud peers, the value is less about a single giveaway and more about a free entry point across compute, app hosting, and identity.
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Netlify
A web app deployment platform, Netlify hosts sites and apps from Git, the CLI, drag-and-drop uploads, API workflows, or AI prompts. It packages global CDN delivery with deploy previews, serverless functions, built-in identity, file storage, and managed Postgres through Netlify Database. For builders, the free tier is notable less for a throwaway trial than for a usable starting point: 300 credits a month, unlimited deploy previews, and the basics needed to ship modern frontend projects with some backend pieces attached. Compared with static hosting alone, it stretches into app infrastructure without forcing an early move to paid cloud services.
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Railsware Products Studio, LLC
Railsware Products Studio LLC builds developer tools for email and data automation. Mailtrap covers both sides of email work: a sandbox that catches test messages in staging and QA, and an Email API/SMTP service for transactional and promotional sending, with templates, webhooks, SDKs, bulk delivery, and deliverability analytics. Coupler.io is a no-code data integration tool that moves information from 400-plus sources into spreadsheets, BI tools, databases, and CSV, with built-in blending and transformation. Its free plan is the draw for builders who need a perpetual entry point for lightweight pipelines, email testing, or early-stage sending without moving straight to paid infrastructure.
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SmartBear
SmartBear offers tools for API design and application monitoring, covering both the build and runtime sides of software development. Stoplight gives developers a free workspace for OpenAPI and JSON Schema work, with core design and documentation features, interactive docs, mock servers, Git sync, and export support in a single-user, single-project setup. BugSnag adds a free tier for error monitoring and performance tracing across web, mobile, desktop, and server apps, with grouped crashes, stack traces, breadcrumbs, and user context to speed debugging. For builders, the appeal is straightforward: one product helps shape APIs before release, while the other catches failures after deployment.
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StackBlitz
StackBlitz makes a browser-based development environment for building web apps, with Node.js running locally in the tab through its WebContainers tech. That matters for developers who want a full coding workflow without installing local toolchains or relying on remote IDE servers. Its free Personal plan gives unlimited public projects, collections, and GitHub repositories, which is generous for open-source work, demos, and teaching. The platform sits closer to a real browser runtime than a lightweight online editor, so it is useful when you need to spin up and share production-style code quickly. Bolt.new extends the same company’s reach into AI-assisted app and site building, but the core free tier remains the browser IDE.
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Supabase
Supabase is a Postgres development platform for building backend infrastructure in modern applications. It packages managed Postgres with authentication, instant APIs, Edge Functions, realtime subscriptions, storage, and vector embeddings, so teams can move from prototype to production without stitching together separate services. The free tier is notable because it gives developers a serious starting point for app backends, not just a trial account. It is useful for builders who want a familiar SQL database with the surrounding pieces already in place, especially when compared with cloud platforms that split these features across multiple products. Logflare adds hosted logging and analytics for apps, with integrations for common runtime and observability tools.
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Twilio
Twilio sells communications APIs for SMS, voice, email, WhatsApp, RCS, video, and related customer-engagement workflows, with separate products for messaging, verification, conversations, and contact-center use. For builders, the appeal is a free trial that does not require a credit card, plus a broad sandbox for wiring up real channels before committing. SendGrid sits alongside it as the email side of the platform, offering transactional email and SMTP with marketing tools. Compared with narrower point solutions, the free entry point spans multiple channels in one place, which is useful for teams prototyping sign-up flows, alerts, two-factor auth, or basic support messaging without stitching together several vendors.
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Vercel
Vercel is a cloud platform for building and deploying modern web apps, with tooling that covers previews, CI/CD, serverless and edge compute, and global delivery. Its free tier is notable for giving developers a real path from code to production without moving immediately to a paid plan. Builders can use it to test frontend workflows, ship personal projects, and serve apps with the same deployment model larger teams use. The directory also includes v0 by Vercel, a prompt-to-app builder with GitHub sync, visual editing, and one-click deploys. Its free plan adds monthly credits and access to the core workflow, though message limits keep it aimed at lightweight use.