ChatGPT Substitute: Open WebUI on Opsily
Get the ChatGPT experience your team loves—ChatGPT-like interface, multiple models, team collaboration—without the per-user fees, vendor lock-in, or data leaving your control. Open WebUI trusted by 147,000+ developers.
Why Open WebUI Is the ChatGPT Substitute Teams Choose
Stop paying per-seat fees for AI. Get the ChatGPT-like experience with privacy, control, and team features built in.
Cancel Expensive Per-Seat Subscriptions
ChatGPT Plus and similar services charge per user per month. Open WebUI on Opsily scales to unlimited team members on one flat plan. Add your 50th team member at zero additional cost. No per-user fees. One bill.
Your Data Stays Private
ChatGPT sends every prompt to OpenAI's servers. Open WebUI keeps everything on your instance. Opsily hosts in Frankfurt, Germany, fully GDPR compliant. No third-party access. Audit logs for regulatory teams. Your data never leaves your control.
No Vendor Lock-in, Ever
Export conversations, models, knowledge bases, team data. Open WebUI runs on Docker, Kubernetes, or your own servers. Move to a different hosting provider without losing access. Your data is always yours to take with you.
Built for teams who need reliability
When teams search for a ChatGPT substitute, they're not looking for second-best.
They want everything ChatGPT offers—the interface, the speed, the model options—without the three things that drive them crazy:
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Per-user SaaS fees. ChatGPT Plus and Enterprise plans charge per person per month. Teams with 20 people get a $200+ bill every month. That scales badly.
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Data sent to third parties. Every prompt you type goes to OpenAI's servers. Compliance teams hate that. GDPR teams hate that. Teams with confidential work hate that.
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Vendor lock-in. You can't export your conversations to another tool. You can't run your own version. You can't control where your data sits.
Open WebUI solves all three. Same interface. Same speed. Same model support. Different ownership.
Teams switching to Open WebUI as a ChatGPT substitute aren't compromising. They're leveling up.
Deploy Your ChatGPT Substitute in Minutes
From sign-up to team collaboration: under 5 minutes. No DevOps skills required.
Choose Your App
Select an app to get started.
Create Your Account
Email, password, done. No credit card required to explore.
Click Deploy
Find Open WebUI in our app catalog. Click Install. Your private instance spins up in 60 seconds on secure German servers.
Connect Your Model
Use your OpenAI API key, Mistral, local Ollama, or GroqCloud. Your choice. No setup scripts. No terminal commands.
Invite Your Team
Send invites. Set roles and permissions. Your team logs in and starts chatting immediately. No training needed.
Everything Included in Your ChatGPT Substitute
Every Opsily plan includes the full feature set. We don't charge extra for team features, knowledge bases, or model integrations.
See All FeaturesGitHub Stars: The Most Trusted Open-Source ChatGPT Substitute
147,000 developers and teams rely on Open WebUI as their self-hosted ChatGPT substitute. 21,300 forks. 17,200+ commits. Built and supported by a global community.
Enterprise-Ready. Compliant. Auditable.
Open WebUI on Opsily meets the standards that regulated teams demand.
GDPR Compliant
Data hosted in Frankfurt, Germany. Article 32 encryption. Data Processing Agreements. Meets the compliance requirements that drive teams to choose a ChatGPT substitute.
HIPAA-Ready
Healthcare teams deploy Open WebUI on Opsily for HIPAA-compliant AI assistance. Business Associate Agreements available for regulated workflows.
No Vendor Lock-in
Export your data anytime. Move your instance anywhere. Open WebUI on Opsily never holds your data hostage. Full portability, guaranteed.
24/7 Monitoring
99.9% uptime SLA. Automated failover. Real-time alerts. Your ChatGPT substitute stays up so your team stays productive.
Audit Logs
Full activity trails for compliance teams. See who accessed what, when. Immutable records for regulatory inspection.
Transparent Pricing for Your ChatGPT Substitute
One flat price per plan. No per-user fees. No surprise charges. All plans include GDPR-compliant German hosting, unlimited team members, and full Open WebUI features.
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Questions About Open WebUI as Your ChatGPT Substitute?
We've answered the questions teams ask before making the switch.
Yes, it is widely considered the leading self-hosted ChatGPT alternative. It offers a familiar interface but allows you to connect to local Ollama instances for maximum privacy or use API keys for external models. This flexibility allows you to switch models as the technology evolves without changing your user interface. You are never locked into a single provider's ecosystem, and your data remains under your control.
Stop Paying Per-User AI Fees
Deploy your ChatGPT substitute. Start free. No credit card required.