Replika vs Sonia
Which Chatbots AI tool is better in 2026?
Replika
AI companion who cares
Sonia
A voice-based AI therapist in your pocket, built by MIT and ETH AI researchers
Side-by-side
Replika is the more established option (raised $11.2M); pricing is comparable on both sides.
| Metric | Replika | Sonia |
|---|---|---|
| Taglinei | AI companion who cares | A voice-based AI therapist in your pocket, built by MIT and ETH AI researchers |
| Foundedi | 2017🏆 | 2023 |
| HQi | San Francisco, US | New York, United States |
| Employeesi | 51-100🏆 | — |
| Neuron scorei | 40 | 65🏆 |
| Total fundingi | $11.2M🏆 | $3.4M |
| Latest roundi | Series A · Nov 2017 | Seed |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed |
| Free plani | ✓ | ✗ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Free | Free trial |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Replika and Sonia.
| Capability | Replika | Sonia |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✗ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Replika
- Has raised more capital ($11.2M vs $3.4M)
- Offers a free plan
- More mature (2017)
🔵 Strengths of Sonia
- Higher Neuron score (65 vs 40)
- Offers a free trial
- Newer company (2023)
Which should you choose?
Choose Sonia if price matters most — it starts at Free trial, which is friendlier for teams watching burn. Both AI Chatbots tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Replika if you want the most established option — it has raised $11.2M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Replika vs Sonia — which is better?
It depends on your priority. Replika has raised more capital and is the more established option; Sonia has broader feature depth. See the side-by-side table above.
Is Replika cheaper than Sonia?
No — Sonia's cheapest paid plan is Free trial, while Replika's is Free.
Do Replika and Sonia offer free plans?
Replika: Yes, has a free plan. Sonia: Free trial only.
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