Open Source Retool Alternative
Own your internal tools. Appsmith is Apache 2.0 licensed, fully transparent, and runs anywhere. No vendor lock-in. No per-user billing. No proprietary limits.
Why Teams Choose Open Source
You Own Your Code
With proprietary platforms like Retool, your app logic lives on their servers. They own your workflow. They set your limits.
Appsmith is different. It's Apache 2.0 licensed open-source software. You can read the code. You can modify it. You can fork it. You can run it on your infrastructure, your data center, or behind your firewall.
No Vendor Lock-In
Your applications aren't trapped. Export them anytime: your UI, your database connections, your logic - all yours to move, modify, or integrate elsewhere. You control your future.
Cost Control
Retool charges per builder ($46/month in Europe) plus per internal user ($14/month each). Teams of 10 quickly exceed $1,000/month. Appsmith charges one flat rate per server. More users: zero extra cost.
Unlimited Customization
Need custom business logic? Write JavaScript. Need a workflow that doesn't fit the UI builder? Code it. Need to integrate a system Appsmith doesn't natively support? You own the code - extend it yourself.
Why Opsily for Appsmith
Managed open-source hosting that keeps your advantage.
No Per-User Billing
One flat-rate server. Unlimited users, unlimited builders, unlimited deployments. Grow your team without growing your bill. Opsily's model respects the open-source ethos: software scales freely, you pay for infrastructure, not seats.
GDPR by Default
Your data stays in our German data center. Automatic encryption, data residency compliance, no cross-border transfers. Open-source means transparency—you can verify our infrastructure independently if needed.
Always Up-to-Date
Appsmith releases frequently. We handle patching, upgrades, and maintenance. You get security fixes and new features automatically—without managing servers or breaking your deployments.
Built for teams who need reliability
Everything Included
Build powerful internal tools without reinventing the wheel.
Opsily Hosting Plans
All plans include GDPR-compliant German hosting, 24/7 monitoring, automatic backups, and SSL. One flat rate. Unlimited users.
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Security & Compliance
Open-source transparency meets enterprise security.
GDPR Compliant
Your data stays in Germany. No transfers to US servers. Automated compliance by default.
Encrypted Always
Data in transit (TLS 1.3) and at rest (AES-256). Appsmith is open-source, so encryption is verifiable.
Open Source Verified
Apache 2.0 license. No hidden code. No telemetry surprises. You can audit the source yourself.
Regular Updates
Security patches deployed automatically. Appsmith's active community means vulnerabilities are caught and fixed quickly.
Backup Infrastructure
Daily encrypted backups. Redundant storage. Recovery time objective (RTO) under 1 hour.
Frequently Asked Questions
Appsmith is open-source (Apache 2.0), meaning you can read and modify the code. Retool is proprietary SaaS. Appsmith charges one flat rate per server; Retool charges per builder ($46/month in Europe) plus per internal user ($14/month each). At 10+ users, Retool quickly exceeds $1,000/month. Appsmith's flat-rate model means unlimited users cost the same. Both have drag-and-drop builders, database integrations, and custom JavaScript support.
Own Your Internal Tools
Stop paying per user. Start building with open-source. Appsmith on Opsily. Flat pricing. GDPR by default. Unlimited users.