Decagon vs Sierra
as AI assistants see them, week of 2026-09-21
Decagon and Sierra land close together overall, with scores of 27 and 25 out of 100 and mentions in 27 and 25 of 60 answers respectively. Decagon swept full marks on "best AI agent to handle email support tickets," "best AI support agent that can take actions like refunds or order lookups," and "best AI customer support agents," all 3 of 3 answers, a question where Sierra also matched it. Head-to-head, Decagon was named more often on 3 questions versus 1 for Sierra, with 16 ties. By assistant, Claude rates Sierra higher (48 vs 45), while Perplexity favors Decagon (8 vs 3). Neither is ever named for open-source, ecommerce, or easiest-setup questions.
Head to head
| metric | Decagon | Sierra |
|---|---|---|
| score | 27 | 25 |
| questions won | 17 | 16 |
By assistant
Decagon
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 27 | 40% of answers | #4.1 |
| Claude | 45 | 80% of answers | #6.1 |
| Gemini | not sampled this week | ||
| Perplexity | 8 | 15% of answers | #6.7 |
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 Decagon gets named for
- What's the best AI tool to draft replies for support agents rather than replace them?
Only Sierra gets named for
nothing exclusive
More comparisons
- Ada vs Decagon
- Decagon vs Gorgias
- Decagon vs Salesforce Agentforce
- Decagon vs Freshdesk
- Ada 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