- Free tier$1.00 / moFTV 44

HiveMQ Cloud
HiveMQ Cloud is a fully managed MQTT broker platform hosted by HiveMQ. It provides a serverless free plan for learning and experimentation, plus paid Starter and Enterprise plans for larger deployments.
- Always freeUnboundedFTV 90
HNcast
HNcast is a web player for Hacker News stories that presents top stories one at a time as brief audio playback. The interface includes story browsing, playback controls, bookmarks, a feed view, and stats pages, with sign-in support for saving user state.
- Free tier$5.00 / moFTV 54

Honeybadger
Honeybadger is an application monitoring service for Ruby on Rails, Elixir, PHP, Python, JavaScript, Node.js, and other platforms. It combines error tracking, structured logging, uptime monitoring, cron and heartbeat monitoring, status pages, and APM-style dashboards in one hosted product.
- Free tier$45 / moFTV 61
Honeycomb
Honeycomb is an observability platform for collecting and querying logs, metrics, traces, and other structured telemetry. It supports distributed tracing, BubbleUp analysis, OpenTelemetry ingestion, query history, permalinks, and Honeycomb Metrics.
- Free tier$3.00 / moFTV 49

Hook Relay
Hook Relay is a webhooks-as-a-service platform that accepts webhook requests, stores them in DynamoDB, and queues them in SQS for delivery to a customer-supplied URL. It includes delivery retries with...
- Free tier$59 / moFTV 68

Hook0
Hook0 is an open-source webhooks-as-a-service platform that lets developers send webhook events through a REST API. It handles delivery attempts, retries, HMAC signatures, TLS encryption, replay defense, monitoring, and replay from a dashboard or API.
- Free tier$39 / moFTV 69

Hookdeck Event Gateway
Hookdeck Event Gateway is a webhook and event ingestion service that receives inbound HTTP requests, applies routing and filtering rules, queues events, and delivers them to downstream destinations. I...
- Always freeFTV 0
Hoppscotch
Hoppscotch is a developer-first API platform for creating, testing, documenting, and sharing APIs. It is designed to help teams move from prototyping to production without switching tools, and it supports both cloud use and self-hosted deployment.
- Free trial$18 / moFTV 34

HostedScan
HostedScan is a vulnerability scanning platform for websites, servers, networks, and APIs. It combines multiple scanners in one service, including Greenbone OpenVAS, Tenable Nessus, OWASP ZAP, Nmap, Nuclei, and SSLyze, and adds scheduling, alerts, reporting, and vulnerability management.
- Always freeUnboundedFTV 100
Hosting Checker
Hosting Checker is a web-based lookup tool that resolves a domain name or IP address in real time and returns hosting provider, server location, ISP, ASN, reverse DNS, timezone, and proxy status detai...
- Free tier$29 / moFTV 55
Hound
Hound is an automated code review tool for GitHub pull requests. It comments on code quality and style issues when a pull request is opened or updated, so teams can review changes against configured style guides and linters.
- Free creditFTV 26

HS Ping
HS Ping is an HS code lookup API that returns officially sourced HS and HTS classification data across multiple countries. It accepts keyword, HS code, or combined queries and exposes structured JSON responses with hierarchy, source attribution, version, and last-updated fields.
- Always freeUnboundedFTV 90

HTTP Observatory
HTTP Observatory is a Mozilla tool that scans a website’s HTTP headers and related security settings to check compliance with common security best practices.
- Free tier$2.00 / moFTV 50
httpSMS
httpSMS is a service that turns an Android phone into an SMS gateway with a programmable HTTP API. It lets developers send and receive SMS messages through a companion Android app installed on a phone...
- Free tier$2.00 / moFTV 42
httpsms.com
httpsms.com is a sandbox web interface for receiving SMS messages on a shared US phone number. It exposes a public inbox that can be used anonymously to view incoming and outgoing text messages in the browser.
- Free tier$3.00 / moFTV 49

HubSpot
HubSpot is an agentic customer platform that brings marketing, sales, customer service, content, data, and commerce tools together in one system. It is designed to help businesses attract leads, manage customer relationships, automate workflows, and grow revenue with connected data and built-in AI.
- Free tier$9.00 / moFTV 59
Hugging Face
Hugging Face is an AI collaboration platform where the machine learning community builds, shares, and discovers models, datasets, and applications. It provides a central hub for experimentation, deployment, and collaboration across a wide range of machine learning workflows.
- Free tier$20 / moFTV 55
Huly
Huly is an open-source team workspace that combines project management, task planning, chat, documents, inbox, and virtual office features in one product. It includes team planner views, notifications...
- Always freeUnboundedFTV 90
Hurricane Electric Free DNS
Hurricane Electric Free DNS is a hosted DNS management portal for forward and reverse DNS zones. It supports dual-stack access over IPv4 and native IPv6, and provides record management for A, AAAA, ALIAS, CNAME, CAA, MX, NS, TXT, SRV, SSHFP, SPF, RP, NAPTR, HINFO, LOC, and PTR records.
- Free tier$4.00 / moFTV 52

Hygger
Hygger is a project management platform with Kanban boards, task lists, timelines, roadmaps, backlog management, and Scrum support. The product includes swimlanes, WIP limits, sub-columns, story points or hours estimation, burndown charts, velocity tracking, and sprint release reports.
- Free tier$199 / moFTV 80
Hygraph
Hygraph is a headless CMS that exposes structured content through APIs for developers and content teams. The platform supports GraphQL-based content delivery, content modeling, asset management, localization, workflows, and environment-based development.
- Free creditFTV 36
Hyperbrowser
Hyperbrowser provides cloud browsers on demand through an API for automation, scraping, testing, and AI agent workflows. It is designed to let teams run headless browser sessions without managing brow...
- Free tier$10 / moFTV 50
Hypertune
Hypertune is a feature flag and experimentation platform with type-safe SDKs, Git-based version control, analytics, and app configuration. It provides flag evaluation, targeting rules, experiments, ev...
- Free tier$2.00 / moFTV 37

IBM Cloud Free Tier
IBM Cloud Free Tier is an IBM Cloud account offering that includes access to more than 40 always-free products with Lite plans and no expiration date. The account is pay-as-you-go for billable usage b...
- Free tier$2.00 / moFTV 39

Icedrive
Icedrive is a cloud storage service with web, desktop, and mobile apps. It provides file storage and access across devices, including a desktop virtual drive that mounts cloud storage as if it were a ...
- Free tier$1.50 / moFTV 45
IFTTT
IFTTT is a no-code automation service that connects apps and devices through Applets. Users choose a trigger, an action, and optional customization to build workflows across services such as Google Calendar, Sheets, Email, Webhooks, and smart home devices.
- Free tier$9.00 / moFTV 50
Ilograph
Ilograph is an interactive diagramming platform for documenting and explaining system architecture with depth and clarity. It helps teams create zoomable, model-based diagrams that can move from high-level overviews to detailed component interactions in a single visual system.
- Free tier$29 / moFTV 66

Image Charts
Image Charts is a chart generation API that renders charts as images from chart configuration data. It supports chart templates, custom URLs, embed codes, and integrations with Zapier and Make for automating chart creation in emails, reports, PDFs, and other workflows.
- Free tier$30 / moFTV 68

ImageEngine Kube
ImageEngine Kube is a self-hosted image optimization engine that runs in Kubernetes or Docker inside the customer’s own infrastructure. It processes image requests through the customer’s CDN and origi...
- Free tier$9.00 / moFTV 49

ImageKit.io
ImageKit.io is an image and video API with an integrated digital asset management (DAM) layer. It connects to existing storage such as S3, Google Cloud Storage, Blob Storage, or HTTP origins, then serves media through URL-based optimization, transformation, and delivery APIs.
- Free tier$2.00 / moFTV 40

ImgBB
ImgBB is an image hosting service that lets users upload images from a computer, by drag and drop, paste, or image URL, and then share direct image links, BBCode, or HTML thumbnails. It also exposes an API and a browser plugin for uploads.
- Free trial$25 / moFTV 48

Imgix
Imgix is a visual media platform that processes images and video through URL-based transformations and a delivery pipeline. The service supports automatic compression, resizing, format conversion, foc...
- Free tier$2.00 / moFTV 49
Imitate Email
Imitate Email is a sandbox email server for software teams. It provides an embedded email viewer and test mailbox workflow for developers, QA teams, and integration testing, with access through browser extensions, a web widget, SMTP, IMAP/POP3, and web sockets.
- Free tier$3.00 / moFTV 52
ImprovMX
ImprovMX is an email forwarding service for custom domains. It routes incoming mail to one or more destination addresses, and also offers SMTP sending for outbound mail from the same domain.
- Free tier$2.00 / moFTV 42

Inboxes App
Inboxes App is a Chrome browser extension that creates temporary disposable email addresses inside the browser. Incoming messages for each generated address are shown in the extension, and the address can be deleted when it is no longer needed.
- Free tier$3.00 / moFTV 47
IncidentHub
IncidentHub is a status page monitoring service that tracks third-party vendors, including cloud, SaaS, utility, and private status endpoints. It ingests public status pages, private status pages, and...
- Free tier$7.00 / moFTV 56

IndexPlease
IndexPlease is a URL indexing platform that helps websites get discovered faster across search engines such as Google and Bing. It automates the process of monitoring site URLs, submitting sitemaps, a...
- Free tier$8.00 / moFTV 56
Infisical
Infisical is an open-source platform for managing application secrets, certificates, SSH keys, privileged access, and secret scanning across development and production environments. It provides a dash...
- Free credit$250 creditFTV 63
InfluxDB
InfluxDB is a time series database for real-time systems that ingest, store, query, and analyze high-resolution operational data. The page describes self-managed InfluxDB 3 Core (OSS) and InfluxDB 3 E...
- Free tier$25 / moFTV 66
Inngest
Inngest is a workflow orchestration platform for durable execution of backend code, background jobs, endpoints, and AI agents. It wraps functions in steps to add retries, recovery, throttling, batchin...
- Free tier$1.00 / moFTV 49
Insights
Insights is a privacy-focused web analytics platform for developers. It tracks page views and custom events through a JavaScript snippet, with support for anonymous page-view collection, event tracking, and configurable tracking logic for web apps.
- Free tier$6.00 / moFTV 57
Insomnia
Insomnia is an AI-native API collaboration platform for developers who design, test, debug, and manage endpoints across REST, GraphQL, gRPC, WebSocket, Socket.IO, and SSE workflows. It combines an API...
- Free tier$5.00 / moFTV 56

Inspector
Inspector is a PHP application monitoring tool that traces transactions, events, exceptions, slow queries, and external calls from code instrumentation rather than server-side agents. It supports Lara...
- Free trial<$1 / moFTV 13

Install On Air
Install On Air is a web-based service for distributing iOS and Android app builds over the air. A developer uploads an IPA or APK file, the service generates a secure installation link, and testers op...
- Free tier$3.00 / moFTV 51
Instatus
Instatus is a status page and incident management service that lets teams monitor services, coordinate incident response, and publish service status updates for customers. The pricing page lists Start...
- Free tier$4.00 / moFTV 41

Integrately
Integrately is an automation platform that connects 1,500+ apps and provides 20 million+ ready automations. Users select a prebuilt automation, connect accounts, and activate the workflow without building it from scratch.
- Always free$3.00 / moFTV 20
IntenseDebate
IntenseDebate is a comment system for blogs and websites that adds threaded replies, reply-by-email, email notifications, commenter profiles, moderation and blacklisting controls, social sign-in, and ...
- Free tier$9.00 / moFTV 58
Interactive CV
Interactive CV is a web-based resume and job-search tool that lets users upload a CV, analyze a job description or job URL, and generate an ATS-oriented resume match report. The product also includes ...
- Always freeUnboundedFTV 90

Internet.nl
Internet.nl is a web-based test tool that checks whether a website, email domain, or internet connection uses modern Internet standards. It runs tests for IPv6, DNSSEC, HTTPS, DMARC, STARTTLS, DANE, and related standards, then reports the results for the entered domain or address.
- Free tier$1.00 / moFTV 50

Internxt
Internxt is an encrypted cloud storage service with desktop, mobile, and web apps. The service uses zero-knowledge encryption, end-to-end encryption, AES-256 for data at rest, and TLS 1.3 for data in ...
- Always freeUnboundedFTV 100
IntoDNS.ai
IntoDNS.ai is a DNS and email security scanner that runs deterministic checks against a domain and returns evidence for SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, FCrDNS, blacklists, and selected web se...
- Free tier$35 / moFTV 58
Invantive Cloud
Invantive Cloud is an online data integration platform that exposes more than 105 cloud and on-premise data sources through a virtual SQL layer and OData access. It is used to combine data for reporting, dashboards, web apps, and automated exchange between applications.
- Free tier<$1 / moFTV 46

IP Geolocation API
Abstract API’s IP Geolocation API provides location intelligence for IP addresses, helping developers identify where a user is connecting from and enrich requests with useful contextual data.
- Free tier$3.00 / moFTV 49
IP-API.com
IP-API.com provides an IP geolocation API that returns location and network metadata for an IP address or domain. The service supports JSON, XML, CSV, newline-separated, and PHP response formats, and ...
- Free tierFTV 7

IP.City
IP.City provides an IP geolocation API that converts an IP address into location data such as country, city, latitude, longitude, and ISP or organization details. It also includes a user-agent decoding API that identifies browser, operating system, and device information from a user-agent string.
- Free tier$1.00 / moFTV 40
Ip2Geo
Ip2Geo is an IP-to-geolocation API service that converts IPv4 and IPv6 addresses into location data through a cloud dashboard, REST API, and SDKs for Node.js, Bun, Deno, and other runtimes. The servic...
- Free tier$15 / moFTV 58
IP2Location.io
IP2Location.io is an IP geolocation API service that returns location and network data for an IP address through REST endpoints. The service includes IP Geolocation API, Domain WHOIS API, and Hosted Domain API, with SDKs and integrations for common developer workflows.
- Free trial$15 / moFTV 41

ipapi
ipapi is an IP address lookup and geolocation API that returns location data for an IP address in JSON and other formats. It exposes fields such as city, region, country, postal code, latitude, longit...
- Free tier$1.00 / moFTV 50

ipapi.is
ipapi.is is an IP address API that returns geolocation, ASN, company, hosting, VPN, proxy, Tor, and abuse intelligence for IPv4 and IPv6 addresses. Requests are made to the hosted API endpoint and can...
- Free tier$2.00 / moFTV 47

ipbase.com
ipbase.com provides an IP geolocation API that returns location and network data for an IP address. The landing page shows lookup fields such as country code, country name, city, latitude, longitude, ASN, organization, ISP, IP range, security flags, and timezone details.