Comparison
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 CustomGPT.ai | 99 USD/mo | trial | Website & app builders |
 Agentset | 49 USD/mo | yes | Website & app builders |
 Hostinger AI Builder | 2.99 USD/mo | trial | Website & app builders |
 Durable | 25 USD/mo | yes | Website & app builders |
 Bolt | 25 USD/mo | yes | Website & app builders |
 Bubble | 29 USD/mo | yes | Website & app builders |
 Dify | 590 USD/yr | yes | Website & app builders |
 LangChain | 39 USD/mo | yes | Website & app builders |
 Supabase | 25 USD/mo | yes | Website & app builders |
Each alternative in short
1. Agentset
Open-source platform for developers to build production-ready RAG chat and search apps that answer from their own documents.
Yes, there is a free plan. Forever free plan: 1,000 pages, 10,000 retrievals, community support; no connectors or custom integrations.
2. Hostinger AI Builder
Builds websites and web apps from a text prompt with hosting, domain and email included, for entrepreneurs and creators without coding skills.
There is a free trial. Start for free button is offered on the homepage, but the pricing page lists only paid plans and does not specify free-plan limits.
3. Durable
AI platform that builds a website, handles SEO, leads, bookings and CRM for small local service businesses.
Yes, there is a free plan. Free plan: free subdomain (*.durable.site), 300 AI credits, CRM for up to 10 customers, basic help center support.
4. Bolt
AI builder that turns text prompts into websites, apps and prototypes, for founders, marketers, PMs and small businesses without coding.
Yes, there is a free plan. Public and private projects, 300K tokens daily limit, 1M tokens per month, website hosting up to 333k web requests, unlimited databases, 10MB file upload limit, Bolt branding on websites.
5. Bubble
No-code platform for building web and mobile apps, with AI prompting and visual editing, for founders, agencies and teams.
Yes, there is a free plan. Build any app for free in the development version; upgrading to Starter is needed to launch a live website and custom domain.
6. Dify
Visual platform for building, testing and deploying AI agents, workflows and RAG pipelines, for teams going from prototype to production.
Yes, there is a free plan. Community Edition is free to self-host with Docker (source-available). The cloud plans listed on the pricing page start with paid tiers; a sandbox tier is referenced in the pricing text but its details are not fully shown.
7. LangChain
Open agent engineering platform for building, testing, deploying and monitoring AI agents, aimed at engineering teams.
Yes, there is a free plan. Developer plan: free, 1 seat, up to 5k base traces per month, then pay-as-you-go, community support. Open source frameworks are free to use.
8. Supabase
Open-source-style Postgres development platform bundling database, auth, APIs, functions, storage and vector search for building apps.
Yes, there is a free plan. Free plan: unlimited API requests, 50,000 monthly active users, 500 MB database, shared CPU with 500 MB RAM, 5 GB egress, 1 GB file storage, community support, limit of 2 active projects.
FAQ
What is the best alternative to CustomGPT.ai?
The most popular option in the same category is Agentset. See the comparison table above.