Langboat 澜舟科技 (Mengzi) vs Sierra AI
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Langboat 澜舟科技 (Mengzi)
Mengzi language models plus a new enterprise digital-worker OS
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Sierra AI
Branded AI agents for customer experience
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| RECATOOLS Score | 6.6 / 10 | 7.2 / 10 |
| Capability | ||
| Value for money | ||
| Ease of use | ||
| ASEAN readiness | ||
| API quality | ||
| Pricing | Enterprise | Enterprise |
| Free tier | — | — |
| Paid from | — | — |
| Has API | ✓ | ✓ |
| Open source | ✗ | ✗ |
| Free to use | ✗ | ✗ |
| Users | — | More than 40% of the Fortune 50 as customers; company reported more than $150M ARR as of early 2026 |
| Founded | — | 2023 |
| Maker | — | — |
| Verdict | Langboat's edge is real: its Mengzi models topped CLUE benchmarks back in 2021, before most of today's LLM startups existed, and the open Mengzi3 (Apache 2.0, up to 13B parameters) still holds a respectable 1.4k GitHub s... |
Sierra builds bespoke, action-taking AI agents for enterprise customer service — resolving issues, processing cancellations, handling upsells — with deep systems integration and strong guardrails. The May 2026 raise ($95... |
| Full review → | Full review → |
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Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.