No moat. Still in business.

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Scans websites and PDFs for WCAG accessibility problems, scores them, and can tag PDFs to fix issues.

Since 2026

Website builders

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Buy call credit and phone landlines or mobiles in 180+ countries from the web or your phone, paying per minute with no subscription.

Pay as you go · Something else

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Draw system or process diagrams that viewers click through one step at a time, then share or embed them on any site.

Since 2026

Free plan · Design and images · Developers

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An AI agent phones and texts fresh inbound leads within seconds, then passes qualified ones to your sales reps.

Since 2017

Subscription · CRM and sales · Trades and home services

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Sends email for hosting companies and multi-tenant apps, and stops spam from compromised customer accounts before it hurts delivery.

Transactional email · Developers

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Lets security teams control which AI agents act, what models see and which tools they call, with a full audit trail.

Free plan · Security and passwords · Software companies

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Free proof-of-work CAPTCHA that runs silently without tracking users and works as a drop-in for reCAPTCHA and hCaptcha APIs.

Free · Security and passwords · Developers

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A reading app for language learners that imports books, articles and videos, translates words and sends vocabulary to Anki.

Free · Courses and learning · Individuals and families

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A self-hosted personal finance app for planning budgets, tracking spending and watching investments.

Free · Money and budgeting · Individuals and families

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Walks people through US immigration forms in plain questions, checks the answers and builds a packet ready to file.

One-off payment · Documents and e-signature · Individuals and families

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Shows Rails teams which requests are slow, flags N+1 queries and SQL timings, and tracks errors in one dashboard.

Free plan · Uptime and monitoring · Developers

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A feedback widget that grabs screenshots, DOM and console logs from users so your coding agent can fix the issue.

Since 2026

Free plan · Customer support · Developers

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Error tracking and product analytics that works with your current Sentry SDK and lets coding agents read issues to fix them.

Free plan · Uptime and monitoring · Developers

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Suggests which days to book off around your country's public holidays to get the longest breaks.

Free · Travel · Individuals and families

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AI reviews of pull requests that teams can run on their own servers for free or use hosted, bringing their own model API keys.

Subscription · Developer tools · Developers

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Web and desktop interface for browsing, troubleshooting, monitoring and governing Apache Kafka data streams.

Since 2023

Free plan · Uptime and monitoring · Developers

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Turns plain-language descriptions into automated workflows that link CRM, support and chat tools for revenue and ops teams.

Since 2026

CRM and sales

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Project management for product teams, with an AI assistant that writes reports, splits tasks into subtasks and drafts PRDs.

Free plan · Projects and tasks · Developers

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Developers can mock or proxy HTTP endpoints at shareable public URLs to test against APIs that are not finished yet.

Free · Developer tools · Developers

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Makes styled QR codes with your logo from a text description and checks they scan, for print, packaging and web.

Since 2026

Pay as you go · Marketing and social

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A self-hosted web logbook where ham radio operators record contacts, track awards and map their QSOs.

Free · Something else · Individuals and families

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Lets small businesses collect subscribers, send newsletters and set up automatic follow-up emails, with a free plan.

Free plan · Email marketing

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Free self-hosted wiki that lets a team organise its documentation into shelves, books and pages.

Since 2022

Free · Notes and knowledge

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Web tools for designers and developers to generate color palettes, gradients and light or dark UI themes.

Since 2019

Free plan · Design and images · Creators and writers

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Watches WordPress sites for vulnerable plugins and themes and blocks exploits with virtual patches until fixes land.

Free trial · Security and passwords · Agencies

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Turns long YouTube videos into captioned short clips for TikTok, Shorts and Reels, and makes short videos from text.

Since 2025

Subscription · Video and audio · Creators and writers

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A distraction-free writing page that saves notes on your device, works offline, and needs no account.

Free plan · Notes and knowledge · Individuals and families

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Creates secured REST APIs from existing databases so apps and AI tools can read data without direct database access.

Developer tools · Developers

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Schedules timed tasks, watches that your jobs and sites stay up, and checks email addresses, for apps on serverless hosts and AI agents.

Free plan · Uptime and monitoring · Developers

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Sends app emails through an API or SMTP relay, plus simple campaigns, hosted in Europe for developers and software teams.

Since 2025

Free plan · Email marketing · Developers

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Builds, tests and deploys code on Windows, Linux and macOS machines, hosted or on your own server.

Free plan · Developer tools · Developers

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Plan a home theater or hi-fi setup: pick gear, model your room in 3D and work out speaker and panel placement.

Home and car · Individuals and families

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Frontend teams can spin up hosted fake REST endpoints, import OpenAPI or Postman files, and fill responses with fake data.

Free plan · Developer tools · Developers

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Turns one to three everyday photos into a professional headshot for LinkedIn, a CV or a staff directory.

Free plan · Design and images · Individuals and families

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Watches YouTube channels and keywords and alerts you when your brand or a rival is spoken about in a video.

Since 2022

Subscription · Marketing and social

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A Slack assistant that learns your company policies and answers staff questions, and helps onboard new hires.

Notes and knowledge

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An email sending API and SMTP service for apps sending large volumes of receipts, resets and alerts, with a vetted shared network.

Since 2026

Subscription · Transactional email · Developers

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A self-hosted web workspace for ClickHouse with a SQL editor, dashboards and cluster monitoring, for data teams.

Free plan · Developer tools · Developers

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Schedule posts to ten social networks from a calendar, a REST call or an AI assistant, priced per connected account.

Free plan · Marketing and social · Agencies

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Hosts a business profile that ChatGPT and Gemini can read, so small firms without a website can still appear in AI answers.

Subscription · Marketing and social

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Gives each AI agent a real email address, and soon a phone number, so it can read mail, reply and use login codes.

Free plan · Developer tools · Developers

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A single-binary self-service tool for teams to define ops workflows, require approvals and run them on remote machines.

Free · Developer tools · Developers

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Tracks Shopify App Store keyword ranks, competitor changes and your app's revenue and churn in one dashboard.

Subscription · Website analytics · Developers

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Upload a faded or scratched old photo and get it repaired, colourised or animated, for families keeping memories.

Pay as you go · Design and images · Individuals and families

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Shared memory store that saves facts from one AI tool and recalls them in others like Claude, ChatGPT and Cursor.

Since 2026

Free · Developer tools · Developers

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An observability backend on ClickHouse that takes logs, metrics, traces and profiles and lets teams query them in Grafana.

Free plan · Uptime and monitoring · Developers

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Runs performance benchmarks in your CI and flags slowdowns on each pull request, for software teams.

Since 2023

Free plan · Developer tools · Developers

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A headless CMS where developers turn React components into blocks that content editors arrange into pages visually.

Since 2024

Website builders · Agencies