Ada vs Sierra
as AI assistants see them, week of 2026-09-21
Ada and Sierra land in almost the same spot overall, scoring 24 and 25 out of 100. Ada gets named in 26 of 60 answers, Sierra in 25 of 60 — close enough to call it even, and head to head across shared questions it's 4 wins for Ada, 3 for Sierra, and 13 ties. Claude rates Sierra higher (48 vs 36), while ChatGPT and Perplexity lean slightly toward Ada. Both show up in every answer for "What are the best AI customer support agents?" but neither appears for questions about drafting replies, easy setup, self-hosting, or ecommerce use.
Head to head
| metric | Ada | Sierra |
|---|---|---|
| score | 24 | 25 |
| questions won | 15 | 16 |
By assistant
Ada
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 28 | 45% of answers | #5.0 |
| Claude | 36 | 70% of answers | #7.4 |
| Gemini | not sampled this week | ||
| Perplexity | 9 | 15% of answers | #5.0 |
Sierra
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 26 | 40% of answers | #4.8 |
| Claude | 48 | 80% of answers | #5.5 |
| Gemini | not sampled this week | ||
| Perplexity | 3 | 5% of answers | #6.0 |
Where they differ
Only Ada gets named for
nothing exclusive
Only Sierra gets named for
- What's the best AI support agent for WhatsApp or social messaging?
More comparisons
- Ada vs Salesforce Agentforce
- Ada vs Decagon
- Ada vs Gorgias
- Ada vs Freshdesk
- Decagon vs Sierra
- Salesforce Agentforce vs Sierra
Not sold on either?
Scores count how often each assistant names a product, weighted by position. How the score works · Full AI customer support agents leaderboard