Head-to-Head Comparison · Alternative to AppSheet · 🧩 no-code apps
AppSheet vs REI3
A sober business-app builder with forms, reports, roles, workflows, and no per-user meter. Here is how REI3 ($0/mo open source) stacks up against AppSheet ($10/mo) across cost, hosting, data privacy, and real-world trade-offs.
AppSheet vs REI3 Specification Matrix
facts verified 2026-08-10
| Dimension | AppSheet (Paid) | REI3 (Replacement) |
|---|---|---|
| Monthly Price | $10 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $120 / yr | $0 / yr (Save $120) |
| 1-Year Cost (5 seats) | $600 / yr | $0 / yr (Save $600) |
| 1-Year Cost (10 seats) | $1,200 / yr | $0 / yr (Save $1,200) |
| Source & License | Proprietary SaaS | open source MIT |
| Where It Runs | Vendor Cloud | Self-host (your server) |
| Platforms | Web / Cloud | desktopmobilewebself-hostedone-click install |
| GitHub Stars | — | ★ 571 (active aug 2026) |
Deep Dive: Switching from AppSheet to REI3
Trade-offs, installation & data architecture
What you trade away
It produces capable browser-based business apps but not AppSheet's native-feeling mobile client, offline behavior, and spreadsheet expression model.
How to deploy REI3
Native Linux/Windows server package or Docker Compose, connected to PostgreSQL
What it takes to run
You must provision PostgreSQL and configure a server/reverse proxy; it is not a managed one-click workspace
Where your data lives
Human-readable application records and configuration live in a PostgreSQL database controlled by the operator
Why fork REI3 instead of vibe-coding a AppSheet clone?
The core loop is buildable, but a dependable replacement becomes a real weekend or multi-day project. For AppSheet, generate a small operational app from a table and a limited rules engine. The hard boundary is google integrations, mobile offline support, governance, and managed sync, plus connectors, runtime reliability, and governance.
AppSheet vs REI3 FAQ
Is REI3 a good free alternative to AppSheet?+
Yes. REI3 is a verified open-source (MIT) replacement for AppSheet. A sober business-app builder with forms, reports, roles, workflows, and no per-user meter.
What is the catch when switching from AppSheet to REI3?+
It produces capable browser-based business apps but not AppSheet's native-feeling mobile client, offline behavior, and spreadsheet expression model.
How much do you save switching from AppSheet to REI3?+
AppSheet costs $10/mo ($120/yr) per seat, whereas REI3 is $0/mo. Switching saves $120/yr for a solo user, $600/yr for a 5-person team, and $1,200/yr for a 10-person team.
How do I install or self-host REI3 instead of AppSheet?+
Install: Native Linux/Windows server package or Docker Compose, connected to PostgreSQL. Setup: You must provision PostgreSQL and configure a server/reverse proxy; it is not a managed one-click workspace
