Attention developers and open-source enthusiasts! Ever felt lost in the sea of software services with free tiers? We've got your back.

This guide is your compass, pointing you to a curated list of as-a-service offerings with sustained free tiers in APIs, Data and ML space.

No trials, no payment walls—just straightforward access to the tools you need for a year or more.

Let's sail through the world of development without getting lost in the waves of expenses!"

• IP.City — 100 Free IP geolocation requests per day

• A11yWatch - Powerful web accessibility tool at scale. Free site-wide web accessibility testing and beyond that resets daily.

• Abstract API — API suite for various use cases, including IP geolocation, gender detection, or email validation.

• Apify — Web scraping and automation platform to create an API for any website and extract data. Ready-made scrapers, integrated proxies, and custom solutions. Free plan with $5 platform credits included every month.

• API Mocha - Completely free online API mocking for testing and prototyping. Make up to 500 daily requests, fully customizable API responses, and download mock rules as a Postman collection.

• APITemplate.io - Auto-generate images and PDF documents with a simple API or automation tools like Zapier & Airtable. No CSS/HTML is required. The free plan comes with 50 images/month and three templates.

• APIToolkit.io - All the tools you need to fully understand what's going on in your APIs and Backends. With automatic API contract validation and monitoring. The free plan covers servers with up to 20,000 requests per month.

• Arize AI - Machine learning observability for model monitoring and root-causing issues such as data quality and performance drift. Free up to two models.

• Atlas toolkit - Lightweight library to develop single-page web applications that are instantly accessible. Available for Java, Node.js, Perl, Python, and Ruby.

• Beeceptor - Mock a rest API in seconds, fake API response and much more. Free 50 requests per day, public dashboard, open endpoints (anyone with a dashboard link can view submissions and answers).

• bigml.com — Hosted machine learning algorithms. Unlimited free tasks for development, limit of 16 MB data/task.

• Browse AI — Extracting and monitoring data on the web. Fifty credits per month for free.

• Bruzu — Automate Image production. Generate tons of Image variants with API, Integrations, or nocode sheet. API is FREE with a watermark.

• Calendarific - Enterprise-grade Public holiday API service for over 200 countries. The free plan includes 1,000 calls per month.

• Canopy - GraphQL API for Amazon.com product, search, and category data. The free plan includes 100 calls per month.

• Clarifai — Image API for custom face recognition and detection. Able to train AI models. The free plan has 5,000 calls per month.

• Cloudmersive — Utility API platform with full access to expansive API Library including Document Conversion, Virus Scanning, and more with 800 calls/month.

• Colaboratory — Free web-based Python notebook environment with Nvidia Tesla K80 GPU.

• Collect2 — Create an API endpoint to test, automate, and connect webhooks. The free plan allows for two datasets, 2000 records, one forwarder, and one alert.

• CometML - The MLOps platform for experiment tracking, model production management, model registry, and complete data lineage, covering your workflow from training to production. Free for individuals and academics.

• Commerce Layer - Composable commerce API that can build, place, and manage orders from any front end. The developer plan allows 100 orders per month and up to 1,000 SKUs for free.

• Conversion Tools - Online File Converter for documents, images, video, audio, and eBooks. REST API is available. Libraries for Node.js, PHP, Python. Support files up to 50 GB (for paid plans). The free tier is limited by file size and number of conversions per day.

• Coupler - Data integration tool that syncs between apps. It can create live dashboards and reports, transform and manipulate values, and collect and back up insights. The free plan has unlimited users, 100 runs with 1000 monthly rows, and unlimited integrations.

• CraftMyPDF - Auto-Generate PDF documents from reusable templates with a drop-and-drop editor and a simple API. The free plan comes with 100 PDFs/month and three templates.

• CurlHub — Proxy service for inspecting and debugging API calls. The free plan includes 10,000 requests per month.

• CurrencyScoop - Realtime currency data API for fintech apps. The free plan includes 5,000 calls per month.

• Cube - Cube helps data engineers and application developers access data from modern data stores, organize it into consistent definitions, and deliver it to every application. The fastest way to use Cube is with Cube Cloud, which has a free tier with 1GB of data passing through each month.

• Data Fetcher - Connect Airtable to any application or API with no code. Postman-like interface for running API requests in Airtable. Pre-built integrations with dozens of apps. The free plan includes 100 runs per month.

• Dataimporter.io - Tool for connecting, cleaning, and importing data into Salesforce. Free Plan includes up to 20,000 records per month.

• Datalore - Python notebooks by Jetbrains. Includes 10 GB of storage and 120 hours of runtime each month.

• Data Miner - A browser extension (Google Chrome, MS Edge) for data extraction from web pages CSV or Excel. The free plan gives you 500 pages/month.

• Datapane - API for building interactive reports in Python and deploying Python scripts and Jupyter Notebooks as self-service tools.

• DB-IP - Free IP geolocation API with 1k request per IP per day.lite database under the CC-BY 4.0 License is free too.

• DB Designer — Cloud-based Database schema design and modeling tool with a free starter plan of 2 Database models and ten tables per model.

• DeepAR — Augmented reality face filters for any platform with one SDK. The free plan provides up to 10 monthly active users (MAU) and tracks up to 4 faces

• Deepnote - A new data science notebook. Jupyter is compatible with real-time collaboration and running in the cloud. The free tier includes unlimited personal projects, up to 750 hours of standard hardware, and teams with up to 3 editors.

• Diggernaut — Cloud-based web scraping and data extraction platform for turning any website to the dataset or working with it as an API. The free plan includes 5K page requests monthly.

• Disease.sh — A free API providing accurate data for building the Covid-19 related useful Apps.

• dreamfactory.com — Open source REST API backend for mobile, web, and IoT applications. Hook up any SQL/NoSQL database, file storage system, or external service, and it instantly creates a comprehensive REST API platform with live documentation and user management.

• DynamicDocs - Generate PDF documents with JSON to PDF API based on LaTeX templates. The free plan allows 50 API calls per month and access to a library of templates.

• DynaPictures - A design automation tool that lets you dynamically generate images over REST API. Change colors, texts, logos, and images on the fly. The free plan includes 30 generated images per month and three image templates.

• Efemarai - Testing and debugging platform for ML models and data. Visualize any computational graph. Free 30 debugging sessions per month for developers.

• Einblick - a modern data science platform that brings Python notebooks to a collaborative canvas and includes tools that automate everyday tasks such as building predictive models (AutoML) or comparing populations. The free tier consists of 5 canvases and unlimited collaborators.

• Exspanse - MLOPS Platform to build, train and deploy ML models and AI solutions. The free plan allows the creation of unlimited projects, 5Gb of cloud storage, and five docker container images.

• ExtendsClass - Free web-based HTTP client to send HTTP requests.

• Export SDK - PDF generator API with drag-and-drop template editor that provides an SDK and no-code integrations. The free plan has 250 monthly pages, unlimited users, and three templates.

• file.coffee - A platform where you can store up to 15MB/file (30/MB file with an account).

• Flatirons Fuse - An embeddable CSV and spreadsheet import tool that makes data to your website fast, easy, and painless.

• FraudLabs Pro — Screen an order transaction for credit card payment fraud. This REST API will detect all possible fraud traits based on the input parameters of an order. The Free Micro plan has 500 transactions per month.

• Geekflare API - Geekflare API lets you take screenshots, audit websites, TLS scan, DNS lookup, test TTFB, and more. The free plan offers 3,000 API requests.

• GeoCod — Free geocoding API: Convert postal addresses into geographic coordinates or convert geographic coordinates into postal addresses (reverse geocoding).

• GeoDataSource — Location search service looks up city names using latitude and longitude coordinates. Free API queries up to 500 times per month.

• Glitterly - Programmatically generate dynamic images from base templates. Restful API and nocode integrations. The free tier comes with 50 images/month and five templates.

• GoodData - Data as a Service - Create interactive and insightful dashboards. The free tier comes with five workspaces and 100 MB/workspace.

• Hex - a collaborative data platform for notebooks, data apps, and knowledge libraries. Free community version with up to 3 authors and five projects. One compute profile per author with 4GB RAM.

• Hook0 - Hook0 is an open-source Webhooks-as-a-service (WaaS) that makes it easy for online products to provide webhooks. Dispatch up to 3,000 events/month with seven days of history retention for free.

• Hoppscotch - A free, fast, and beautiful API request builder.

• Hybiscus - Build pdf reports using a simple declarative API. The free tier includes up to 100 single-page reports per month with the ability to customize color palettes and fonts.

• Invantive Cloud — Access over 70 (cloud)platforms such as Exact Online, Twinfield, ActiveCampaign or Visma using Invantive SQL or OData4 (typically Power BI or Power Query). Includes data replication and exchange. Free plan for developers and implementation consultants. Free for specific platforms with limitations in data volumes.

• ipaddress.sh — Simple service to get a public IP address in different formats.

• ipbase.com - IP Geolocation API - Forever free plan that spans 150 monthly requests.

• Iploka — IP to Geolocation API - Forever free plan for developers with 10k requests per month limit.

• IP Geolocation — IP Geolocation API - Forever free plan for developers with 30k requests per month (1k/day) limit.

• IP Geolocation API — IP Geolocation API from Abstract - Extensive free plan allowing 20,000 monthly requests.

• IP2Location — Freemium IP geolocation service. LITE database is available for free download. Import the database in the server and perform a local query to determine the city, coordinates, and ISP information.

• IP2Location.io — Freemium, fast and reliable IP geolocation API to determine geolocation data like city, coordinates, ISP, etc. The free plan is available with 30k credits per month. Subscribe to paid plans for more advanced features or contact us for a personalized plan.

• ipapi - IP Address Location API by Kloudend, Inc - A reliable geolocation API built on AWS, trusted by Fortune 500. The free tier offers 30k lookups/month (1k/day) without signup.

• ipapi.is - A reliable IP Address API from Developers for Developers with the best Hosting Detection capabilities that exist. The free plan offers 1000 lookups without signup.

• IPinfo — Fast, accurate, and free (up to 50k/month) IP address data API. Offers APIs with details on geolocation, companies, carriers, IP ranges, domains, abuse contacts, and more. All paid APIs can be trialed for free.

• IPList — Lookup details about any IP address, such as Geo IP information, tor addresses, hostnames, and ASN details. Free for personal and business users.

• BigDataCloud - Provides fast, accurate, and free (Unlimited or up to 10K-50K/month) APIs for modern web like IP Geolocation, Reverse Geocoding, Networking Insights, Email and Phone Validation, Client Info and more.

• IPTrace — An embarrassingly simple API that provides your business with reliable and helpful IP geolocation data.

• JSON2Video - A video editing API to automate video marketing and social media videos, programmatically or with no code.

• JSON IP — Returns the Public IP address of the client it is requested from. No registration is required for the free tier. Using CORS, data can be requested using client-side JS directly from the browser. Useful for services monitoring change in client and server IPs. Unlimited Requests.

• konghq.com — API Marketplace and powerful private and public API tools. With the free tier, some features such as monitoring, alerting, and support, are limited.

• Kreya — Free gRPC GUI client to call and test gRPC APIs. Can import gRPC APIs via server reflection.

• Lightly — Improve your machine-learning models by using the correct data. Use datasets of up to 1000 samples for free.

• LoginLlama - A login security API to detect fraudulent and suspicious logins and notify your customers. Free for 1,000 logins per month.

• MailboxValidator — Email verification service using real mail server connection to confirm valid email. The free API plan has 300 verifications per month.

• Meteosource Weather API — global weather API for current and forecasted weather data. Forecasts are based on a machine learning combination of more weather models to achieve better accuracy. The free plan comes with 400 calls per day.

• microlink.io – It turns any website into data such as metatags normalization, beauty link previews, scraping capabilities, or screenshots as a service. One hundred reqs/day, every day free.

• Mindee – Mindee is a powerful OCR software and an API-first platform that helps developers automate applications' workflows by standardizing the document processing layer through data recognition for key information using computer vision and machine learning. The free tier offers 250 pages per month.

• monkeylearn.com — Text analysis with machine learning, free 300 queries/month.

• MockAPI — MockAPI is a simple tool that lets you quickly mock up APIs, generate custom data, and perform operations using a RESTful interface. MockAPI is meant to be a prototyping/testing/learning tool. One project/4 resources per project for free.

• Mockfly — Mockfly is a trusted development tool for API mocking and feature flag management. Quickly generate and control mock APIs with an intuitive interface. The free tier offers 500 requests per day.

• Mocki - A tool that lets you create mock GraphQL and REST APIs synced to a GitHub repository. Simple REST APIs are free to develop and use without signup.

• Mocko.dev — Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integration tests.

• Mocky - A simple web app to generate custom HTTP responses for mocking HTTP requests. Also available as open source.

• reqres.in - A Free hosted REST-API ready to respond to your AJAX requests.

• microenv.com — Create fake REST API for developers with the possibility to generate code and app in a docker container.

• neptune.ai - Log, store, display, organize, compare, and query all your MLOps metadata. Free for individuals: 1 member, 100 GB of metadata storage, 200h of monitoring/month

• News API — Search news on the web with code, and get JSON results. Developers get 3,000 queries free each month.

• Nordigen — Free open banking data API. PSD2. Connect 2300+ banks with your app/software in EU+UK.

• Nyckel — Train, deploy, and invoke image and text ML models. Free training with up to 5,000 pieces of training data. 1000 model invokes per month free.

• Observable — a place to create, collaborate, and learn with data. Free: Unlimited notebooks, Unlimited publishing, Five editors per notebook.

• OCR.Space — An OCR API parses image and pdf files that return the text results in JSON format. Twenty-five thousand requests per month are free.

• Duply.co — Create dynamic images from API & URL, design template once and reuse it. The free tier offers 70 images/month creation from API & URL and Up to 100 through Form.

• OpenAPI3 Designer — Visually create Open API 3 definitions for free.

• Orchest — Visual pipeline editor and workflow orchestrator for data science, one instance for free, open source version available.

• parsehub.com — Extract data from dynamic sites, turn dynamic websites into APIs, five projects free.

• pdfEndpoint.com - Effortlessly convert HTML or URLs to PDF with a simple API. One hundred conversions per month for free.

• PDF Factory - PDF Automation API, visual template editor, dynamic data integration, and PDF rendering with an API. The free plan comes with one template, 100 PDFs/month.

• Pixela - Free daystream database service. All operations are performed by API. Visualization with heat maps and line graphs is also possible.

• Postbacks - Request HTTP callbacks for a later time. Eight thousand free requests on signup.

• Postman — Simplify workflows and create better APIs – faster – with Postman, a collaboration platform for API development. Use the Postman App for free forever. Postman cloud features are also free forever with certain limits.

• PrefectCloud — A complete platform for dataflow automation. All plans include 20,000 free runs every month. That's enough to power ETL for most small businesses.

• Preset Cloud - A hosted Apache Superset service. Forever free for teams of up to 5 users, featuring unlimited dashboards and charts, a no-code chart builder, and a collaborative SQL editor.

• PromptLeo - Prompt engineering platform for creators and developers. It offers a prompt engineering library, forms, and API. The free plan provides one prompt formation, one prompt API endpoint, and 30 generations per month.

• PromptLoop - Use AI and large language models like GPT-3 with a simple spreadsheet formula to transform, comprehend, and analyze text in Google Sheets. The first 2,000 credits are free each month.

• ProxyCrawl — Crawl and scrape websites without proxies, infrastructure, or browsers. We solve captchas for you and prevent you from being blocked. The first 1000 calls are free of charge.

• Public-Apis Github Repo — A list of free public APIs.

• Supportivekoala — Allows you to autogenerate images by your input via templates. The free plan allows you to create up to 100 images per week.

• QuickMocker — Manage online fake API endpoints under your own subdomain, forward requests to localhost URL for webhooks development and testing, use RegExp and multiple HTTP methods for URL path, prioritize endpoints, more than 100 shortcodes (dynamic or fake response values) for response templating, import from OpenAPI (Swagger) Specifications in JSON format, proxy requests, restrict endpoint by IP address and authorization header. The free account provides one random subdomain, ten endpoints, 5 RegExp URL paths, 50 shortcodes per endpoint, 100 requests per day, and 50 history records in the requests log.

• Rapidapi - World’s Largest API Hub Millions of developers find and connect to thousands of APIs, API Development using fun challenges (with solutions!) and interactive examples.

• RequestBin.com — Create a free endpoint to which you can send HTTP requests. Any HTTP requests sent to that endpoint will be recorded with the associated payload and headers so you can observe recommendations from webhooks and other services.

• Roboflow - create and deploy a custom computer vision model with no prior machine learning experience required. The free tier includes up to 1,000 free source images.

• ROBOHASH - Web service to generate unique and cool images from any text.

• SaturnCloud - Data science cloud environment that allows running Jupyter notebooks and Dask clusters. Thirty hours of free computation and 3 hours of Dask per month.

• Scraper's Proxy — Simple HTTP proxy API for scraping. Scrape anonymously without having to worry about restrictions, blocks, or captchas. First 100 successful scrapes per month free including javascript rendering (more available if you contact support).

• ScrapingAnt — Headless Chrome scraping API and free checked proxies service. Javascript rendering, premium rotating proxies, CAPTCHAs avoiding. Free plans are available.

• ScraperBox — Undetectable web scraping API using real Chrome browsers and proxy rotation. Use a simple API call to scrape any web page. The free plan has 1000 requests per month.

• ScrapingDog — Scrapingdog handles millions of proxies, browsers, and CAPTCHAs to provide you with the HTML of any web page in a single API call. It also includes Web Scraper for Chrome & Firefox and software for instant scraping demand. Free plans are available.

• scrapinghub.com — Data scraping with visual interface and plugins. The free plan includes unlimited scraping on a shared server.

• Simplescraper — Trigger your webhook after each operation. The free plan includes 100 cloud scrape credits.

• Select Star - is an intelligent data discovery platform that automatically analyzes and documents your data. Free light tier with 1 Data Source, up to 100 Tables and 10 Users.

• Sheetson - Instantly turn any Google Sheets into a RESTful API. Free plan available.

• Shipyard — Low-code data orchestration platform for the cloud. Build with a mix of low-code templates and your code (Python, Node.js, Bash, SQL). Our free developer plan offers 10 hours of runtime every month for one user - more than enough to automate multiple workflows.

• shrtcode API - Free URL Shortening API without authorization and no request limits.

• SerpApi - Real-time search engine scraping API. Returns structured JSON results for Google, YouTube, Bing, Baidu, Walmart, and many other machines. The free plan includes 100 successful API calls per month.

• Sofodata - Create secure RESTful APIs from CSV files. Upload a CSV file and instantly access the data via its API allowing faster application development. The free plan includes 2 APIs and 2,500 API calls per month. You don't need a credit card.

• Stoplight - Saas for collaboratively designing and documenting for APIs. The free plan offers free design, mocking, and documentation tools.

• Svix - Webhooks as a Service. Send up to 50,000 messages/month for free.

• TemplateTo - Auto-Generate PDF/TXT documents from reusable templates with our drop-and-drop editor and simple API. The free plan comes with 450 PDFs/month and three templates.

• TinyMCE - rich text editing API. Core features are free for unlimited usage.

• Webhook Store - Tool for storing third-party webhooks and debug them on localhost (ngrok style). Open source and self-hostable. Free personal domain username.github.webhook.store, free public domains anything.webhook.store.

• Weights & Biases — The developer-first MLOps platform. Build better models faster with experiment tracking, dataset versioning, and model management. Free tier for personal projects only, with 100 GB of storage included.

• wit.ai — NLP for developers.

• wolfram.com — Built-in knowledge-based algorithms in the cloud.

• wrapapi.com — Turn any website into a parameterized API. 30k API calls per month.

• ZenRows — Web Scraping API & proxy server that bypasses any anti-bot solution while offering javascript rendering, rotating proxies, and geotargeting. The free tier of 1000 API calls.

• Zenscrape — Web scraping API with headless browsers, residentials IPs, and straightforward pricing. One thousand free API calls/month and extra credits for students and non-profits.

• ip-api — IP Geolocation API, Free for non-commercial use, no API key required, limited to 45 req/minute from the same IP address for the free plan.

• WebScraping.AI - Simple Web Scraping API with built-in parsing, Chrome rendering, and proxies. Two thousand free API calls per month.

• Zipcodebase - Free Zip Code API, access to Worldwide Postal Code Data. Ten thousand free requests/month.

• huggingface.co - Build, train, and deploy NLP models for Pytorch, TensorFlow, and JAX. Free up to 30k input characters/mo.

• vatcheckapi.com - Simple and free VAT number validation API. Five hundred free requests per month.

• numlookupapi.com - Free phone number validation API - 100k free requests / month.

• Volca - Free API providing lists of technologies such as programming languages and database systems. Unlimited free requests.

• Query.me - Collaborative data notebooks that execute script-like and allow to fetch and send data via SQL, API, and many custom blocks, like Slack and Email. Free for small Teams.

• ERD Lab — Free cloud-based entity relationship diagram (ERD) tool made for developers.

• What The Diff - AI-powered code review assistant. The free plan has a limit of 25,000 monthly tokens (~10 PRs).

• Zipcodestack - Free Zip Code API and Postal Code Validation. Ten thousand free requests/month.

• Zuplo - Add API Key authentication, rate limiting, and developer documentation to any API in minutes. The free plan offers up to 10 projects, unlimited production edge environments, 250 API keys, 100K monthly requests, and 1GB egress.

• OpenWeb Ninja - Extremely comprehensive real-time SERP and public data APIs: Google Search, Shopping, Jobs, Images, Lens, News, Google Maps Businesses / Places, Reviews, Photos, Website Emails and Social Contacts Scraper, Amazon, Yelp and more. All APIs include a free tier with 100 to 200 free monthly requests.

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Happy hacking!