Find the Topoi experience that’s right for you
From casual brainstorming to in-depth writing mentorship, we have a plan for you. Whether you're an unregistered visitor or a registered member, we welcome your feedback and suggestions. Future development may include embeddable widgets, a web API for institutional integration, and LMS compatibility.
Feature Comparison
| Feature | Visitor | Member | BetaPremium | Subscriber |
|---|---|---|---|---|
| Basic Chat with Topoi | ✓ | ✓ | ✓ | ✓ |
| Speech Synthesis** | ✓ | ✓ | ✓ | ✓ |
| Download current session to text file | ✓ | ✓ | ✓ | ✓ |
| Integrated email sharing | - | ✓ | ✓ | ✓ |
| Text file upload to Topoi*** | - | ✓ | ✓ | ✓ |
| Upload docx and pdf files to Topoi*** | - | ✓ | ✓ | ✓ |
| Share session with link | - | ✓ | ✓ | ✓ |
| Session Length Limit**** | 6 exchanges | 20 exchanges | 40 exchanges | Unlimited |
| Session History | - | All sessions | All sessions | All sessions |
| AI-Powered Summary | - | ✓ | ✓ | ✓ |
| OpenAI model***** | gpt-4.1-nano | gpt-4.1-mini | will vary | Choice of model |
| Priority support | - | - | ✓ | ✓ |
*Price to be determined. Estimated at $10–$20 per month.
**Files are limited to a max of about 5000 words. Tests against this limit are applied to .docx and .pdf uploads after text extraction.
***Speech synthesis is powered by your browser's built-in capabilities. Not all browsers support speech synthesis.
****Session length limits are per session, not per day. An exchange is a round trip to the OpenAI server: your prompt and Topoi’s response. Additional limits protect against excessively long prompts and oversized files. Session history is retained indefinitely.
*****Subscriber tier will allow choice of OpenAI models, including GPT-4.1. BetaPremium tier offers early access to premium models and features.
BetaPremium is an invitation-only tier for trusted testers and contributors. It provides early access to new features and expanded usage limits. Interested? Contact us.
Our Pricing Philosophy
We believe in a value-based model: free access to core writing mentorship, with premium features unlocked at a modest subscription rate. Subscriptions help cover AI costs, ongoing development, and dedicated support—ensuring Topoi continues to grow and improve.
- Try Before You Buy: Experience essential features at no cost.
- Accessible & Fair: Basic functionality remains free for everyone.
- Sustainable Growth: Subscriber revenue funds ongoing development and improvements.