Heptabase
Replika
Pricing
PricingPaid
PricingFreemium
Free Plan
Free Plan
Free Plan
Side-by-side comparison based on pricing, features, and community data.
Heptabase and Replika are both AI education tools. Heptabase is Paid; Replika is Freemium. These tools serve entirely different purposes and should not be compared directly.
These tools serve entirely different purposes and should not be compared directly. Heptabase is a knowledge management system for organizing research and ideas visually; Replika is an AI companion for conversation and emotional support. Pick Heptabase if you're a student, researcher, or knowledge worker who needs to externalize complex thinking through spatial organization of notes, PDF annotation, and video learning. Pick Replika if you seek a personalized conversational AI companion for emotional support, social practice, or 24/7 judgment-free interaction. They don't compete—they address separate user needs.
Pick Heptabase if you're a researcher, student, or knowledge worker building complex projects that require visual mapping of ideas across multiple contexts.
Pick Replika if you want a customizable AI companion for ongoing conversation, emotional support, and practicing social connection without human relationship complexity.
| Feature | Heptabase | Replika |
|---|---|---|
| Primary function | Visual knowledge organization & note-taking | AI chatbot companion |
| Free tier | 7-day trial only | Free tier with limits |
| Mobile support | iOS only; no Android | iOS + Android |
| PDF/video tools | ✓ Native annotation & clipping | — |
| Memory/personalization | Cards & tags (user-driven) | ✓ Persistent AI memory across chats |
| Collaboration | Minimal (single-user focus) | Community features only |
| Integrations | Readwise, Kindle, calendar, markdown | None |
| Use case fit | Research, learning, thinking externalization | Emotional support, companionship, social practice |
Synthesized by AI from verified tool data · cached per pair
Full access for individual users
Full access, billed annually
Basic chatting, limited memory
Unlimited messages, advanced memory, custom avatar
