Twenty CRM
CRMThe modern open-source CRM. We self-host, customize objects/workflows, and integrate it with your stack — a no-lock-in alternative to Salesforce and HubSpot.
Learn about Twenty CRM →Open-Source Platforms
Customize the best platforms — own your stack
We build on proven open-source foundations and tailor them to your business. Faster than building from scratch, with none of the SaaS lock-in.
Convex
Backend / RealtimeReactive backend and database for realtime apps — the engine behind many of our custom builds.
Learn about Convex →Cal.com
SchedulingOpen-source scheduling we white-label and embed into client products and booking flows.
Learn about Cal.com →Medusa
CommerceHeadless open-source commerce for fully custom B2C and B2B storefronts.
Learn about Medusa →Supabase
Backend / AuthOpen-source Postgres backend with auth and storage for data-heavy applications.
Learn about Supabase →n8n
AutomationSelf-hosted workflow automation we use to connect your tools and remove manual work.
Learn about n8n →Frequently asked questions
- What is Twenty CRM and why customize it?
- Twenty is a modern open-source CRM and an alternative to Salesforce and HubSpot. Because it is open source, Appex Technology can self-host it, add custom objects and workflows, and integrate it deeply with your stack — so you get a tailored CRM without per-seat SaaS lock-in.
- Why build on open-source platforms instead of SaaS?
- Open-source platforms give you full ownership of your data and code, no per-seat pricing surprises, and unlimited customization. We help you self-host, extend, and maintain them — combining the speed of a ready-made platform with the flexibility of custom software.
- Can you migrate us off an expensive SaaS tool?
- Yes. We regularly migrate teams from costly SaaS to customized open-source equivalents — preserving your data and workflows while cutting recurring costs.
Want a platform tailored to you?
Tell us your workflow — we'll recommend the right open-source foundation and customize it.