Forrester Wave Leader 2026 — enterprise voice and chat agent platform (now NiCE Cognigy).
Demo · hover to playConversational AI agent assist for contact centers — coaches reps and automates after-call work in real time.
| Spec | Cresta | Nabla |
|---|---|---|
| Agent Rank | 80 / 100 (A) | 57 / 100 (C) |
| Autonomy | Semi-autonomous | Autonomous |
| Pricing | Subscription · Free tier | Subscription |
| Open source | No | No |
| Capabilities | Voice, Tool use, Memory, RAG | Voice, Memory, RAG |
| Integrations | 4 apps | 4 apps |
| Verified | Verified | — |
| Released | Mar 2025 | Apr 2025 |
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
Pick Cresta if cost is the main constraint or if you want a vendor we've verified for accessibility and pricing accuracy.
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Pick Cresta if cost is the main constraint or if you want a vendor we've verified for accessibility and pricing accuracy. Pick Nabla if you want the highest autonomy and the verification loop is in place. Most working teams running both can use Cresta for primary work and Nabla for the workflows where its specific strengths matter.
Cresta starts at Subscription · Free tier; Nabla starts at Subscription. Cresta is the cheaper entry option. For team deployments the TCO can differ — use the AI Agent Rank TCO calculator for your specific volume.
Nabla is the more autonomous of the two (Autonomous vs Semi-autonomous). Higher autonomy ships throughput faster but requires verification loops in place — see our autonomous-vs-copilot framing for when each tier wins.
Adjacent agents in the same category with overlapping capabilities — worth a side-by-side glance before you commit.
Forrester Wave Leader 2026 — enterprise voice and chat agent platform (now NiCE Cognigy).
Demo · hover to playEnterprise voice assistants for call centers — natural conversations that resolve customer calls.
AI customer service agent — resolves tickets across chat, email, voice with measurable deflection rates.