Instantly.ai vs Hebbia vs Sierra AI vs Glean
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Instantly.ai
High-volume cold-email and outbound-sales platform with AI reply agent...
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Hebbia
AI for investment research and due diligence
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Sierra AI
Branded AI agents for customer experience
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Glean
Enterprise search and AI assistant for work
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| RECATOOLS Score | 6.9 / 10 | 7.6 / 10 | 7.2 / 10 | 7.8 / 10 |
| Capability | — | |||
| Value for money | — | |||
| Ease of use | — | |||
| ASEAN readiness | — | |||
| API quality | — | |||
| Pricing | Subscription | Contact | Enterprise | Enterprise |
| Free tier | Free trial available | — | — | — |
| Paid from | Growth plan from ~$30/month | — | — | Enterprise custom; reported ~$50-75/user/month, ~100-seat minimum |
| Has API | ✓ | ✗ | ✓ | ✓ |
| Open source | ✗ | ✗ | ✗ | ✗ |
| Free to use | ✗ | ✗ | ✗ | ✗ |
| Users | 50,000+ sales teams | — | More than 40% of the Fortune 50 as customers; company reported more than $150M ARR as of early 2026 | $300M ARR as of May 2026 (customer count not officially disclosed |
| Founded | 2021 | 2020 | 2023 | 2019 |
| Maker | Nils Schneider, Raul Kaevand | — | — | — |
| Verdict | What this is for: Running high-volume outbound email campaigns with unlimited sending accounts, deliverability warmup, AI reply handling, and lead sourcing. Who this is for: Sales teams, lead-gen agencies, and founders... |
Hebbia's Matrix is an enterprise AI analyst that runs structured, agentic reasoning across thousands of documents at once, built for finance, legal, and high-stakes knowledge work where source traceability matters. It ex... |
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... |
Glean is a leading enterprise work-AI platform: it indexes a company's SaaS apps (email, docs, tickets, chat, code) into a permissions-aware search and assistant, with an agent-building layer on top. Its strengths are co... |
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Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.