No moat. Still in business.
Software directory for those who don’t want to rebuild, own the updates, the bugs, the support.
- Appwrite
Open-source backend for app builders with auth, databases, storage, functions and hosting, run in the cloud or on your own servers.
Since 2021
Developer tools · Developers
- Keeper.sh
Copies events between your work, personal and school calendars so you show as busy everywhere, keeping details private.
Free plan · Scheduling and booking · Individuals and families
- authentik
Self-hosted identity provider that gives an organisation single sign-on and login flows across its apps, with APIs and templates.
Security and passwords
- PlanPop
Group calendar app where friends, partners and families layer their schedules to see when everyone is free.
Family and parenting · Individuals and families
- Faable
Hosts apps from Git on European servers and adds user login through a hosted OAuth and OpenID Connect server.
Free plan · Security and passwords · Developers
- Back4app
Hosted app backend with database, user login and generated REST and GraphQL APIs, so developers skip running servers.
Developer tools · Developers
- Para Cloud
Managed hosting of the open-source Para backend with a JSON API, login, search and backups, priced per app.
Free plan · Developer tools · Developers
- Authgear
Login, passkeys, SMS and WhatsApp codes, SSO and user management for apps, run in their cloud or on your servers.
Free plan · Security and passwords · Developers
- Nile
Serverless Postgres that keeps each customer's data and vector embeddings in its own virtual database, for teams building B2B SaaS.
Developer tools · Developers
- Magic Login Pro
Lets WordPress users sign in with an emailed one-time link instead of typing a password.
Security and passwords
- Hanko
Open-source login service with passkeys, 2FA and SSO for app makers, run in Hanko's cloud or on your own servers.
Since 2025
Free plan · Security and passwords · Developers
- WP Booking Calendar
WordPress plugin that lets visitors check open dates or time slots, book and pay, with an admin panel to manage reservations.
Free plan · Scheduling and booking
- Settle It
Make a quick poll, ranking or group availability check and share the link, with no accounts needed.
Since 2026
Scheduling and booking · Individuals and families
- SYNCDATE
Syncs Google, Outlook and iCloud calendars so clients see you as busy while you keep the meeting details.
Free plan · Scheduling and booking · Individuals and families
- Forte
Deploys apps from GitHub and adds sign-in, payments, scaling and monitoring, so small teams can skip building infrastructure.
Since 2026
Subscription · Developer tools · Developers
- Authress
An API that adds login, SSO and fine-grained permissions to the software you build.
Security and passwords · Developers
- CalOverlap
Paste up to four booking links from tools like Calendly, HubSpot or Cal.com to see when every person is free, for teams setting meetings.
Since 2025
Free · Scheduling and booking
- Nhost
Managed backend with Postgres, GraphQL, user sign-in, file storage and serverless functions so developers can ship apps quickly.
Since 2020
Free plan · Developer tools · Developers
- FluentBooking
A WordPress plugin that lets clients book appointments based on your availability and synced calendar.
Scheduling and booking
- InsForge
A hosted backend with database, auth, storage and functions that AI coding agents can set up and run for you.
Since 2025
Developer tools · Developers
- SuperTokens
Adds sign-in to your app with prebuilt screens for passwords, magic links, social login and SSO, self-hosted or managed.
Security and passwords · Developers
- Zitadel
Multi-tenant login and identity service with hosted login pages, SSO, passkeys and MFA for app builders.
Free plan · Security and passwords · Developers