---
title: Pricing — Socrates
description: Choose the amount of structure you need.
canonical: https://topodrive.top/pricing
last-updated: 2026-08-22
---

# Pricing — Socrates

> Choose the amount of structure you need.

Every plan includes Socratic teaching, streaming, LaTeX, model choice, and the built-in Beagle tutor. Start free, then deepen the practice.

## Plans

### Free — $0

Start asking without a card.

- Beagle starter quota
- Guided lessons
- Bring your own API key

[Start free](https://app.topodrive.top)

### Riemann — $9 / month

For a steady personal practice. *Most popular.*

- More learning tokens
- Knowledge graph
- Mistake book

[Subscribe](https://app.topodrive.top/checkout?plan=riemann)

### Descartes — $19 / month

For deeper topics and regular exams.

- Exam mode
- Web search
- Higher limits

[Subscribe](https://app.topodrive.top/checkout?plan=descartes)

### Euclid — $39 / month

For ambitious, sustained study.

- Highest limits
- Priority support
- Full toolkit

[Subscribe](https://app.topodrive.top/checkout?plan=euclid)

## What every plan includes

The same calm tutor, with more room to use it.

- **Teaching** — Socratic dialogue with streaming responses. LaTeX, code, and diagrams render inline.
- **Recall** — A small prompt queue that returns ideas on schedule. Recall history is private to your account.
- **Models** — Choose per session. Bring your own provider key from the API Keys page if you prefer.
- **Privacy** — Sessions are private. We do not train on them. Export or delete any session at any time.

## Choosing a plan

Most people do not need to think about this for long.

1. **How often will you open a session in a week?** One or two sessions → Free or Riemann. Daily → Descartes. Full-time → Euclid.
2. **How long do your sessions tend to run?** Short and focused → lower plans. Walk through entire chapters → more headroom.
3. **Will you use exam mode or web search?** Those live in Descartes and Euclid.

## Frequently asked

- **Cancellation:** Cancel any time from your account page. No retention calls.
- **Switching plans:** Move up or down from the account page. Upgrades take effect immediately and we pro-rate the unused portion.
- **Refunds:** Cancel within fourteen days of a first paid plan and write to us for a refund.
- **Students:** Send a note from your academic address to `help@addtech.site` with a course name and your institution, and we will send a discount code.
- **Invoices & VAT:** Add billing details from the account page. EU customers are billed with VAT applied where required.
- **Team plans:** Not yet as a self-serve plan. We work with research groups, classes, and small companies on a per-team basis — use the [contact](https://topodrive.top/contact) page.

For machine-readable discovery of this pricing, see [OpenAPI](https://topodrive.top/openapi.json) and the [agent card](https://topodrive.top/.well-known/agent-card.json).