Agentic Index

Kore.ai vs Sierra (2026)

Kore.ai last verified ·Sierra last verified

Kore.ai and Sierra are two of the deepest platforms in customer experience, sold in completely different ways. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.

Kore.ai is a platform a team builds on, writing agents in Agent Blueprint Language, installing prebuilt agents from a marketplace and serving one agent on voice and chat across 27 channels. Its plans come from a sales quote, with automation metered in 15 minute sessions. Sierra is priced on outcomes through an enterprise engagement. Kore.ai suits a team that wants to own its agents, and Sierra a company that would sooner buy the outcome with the vendor doing the building.

This comparison is published by Agentic Index, an independent agentic AI vendor research platform. Kore.ai and Sierra are each graded against the same 14 capability Agentic Index taxonomy, from the vendor's own public materials under the Agentic Index verification standard, alongside 1,084 researched vendors. No vendor pays for placement and no vendor has reviewed this page. How this evidence is graded

Choose Kore.ai if

  • Your engineers want agent definitions in Git, reviewed in pull requests like any other code.
  • Your team can start building on free credits before any commitment.
  • You want to own and extend the platform rather than depend on vendor delivery.

Choose Sierra if

  • Outcome pricing means you pay for resolutions rather than for capacity.
  • You want the vendor accountable for performance, not a platform to staff.
  • Enterprise delivery is the model your organization prefers for customer facing systems.
Feature
K
Kore.ai
S
Sierra
Action & orchestration

Integrations & Tool Calling

Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools.

Workflow Orchestration

Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps.

Triggers & Channel Coverage

How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools.

Knowledge & context

Knowledge Grounding & RAG

Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers.

Memory & State Persistence

Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer.

Control & trust

Human Oversight & Guardrails

Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls.

Security, Identity & Governance

RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy.

Observability & Auditability

Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior.

Deployment & Data Residency

Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting.

Solution readiness

Prebuilt Agents, Templates & Packs

Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value.

Platform extensibility

Model Flexibility & Routing

Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys.

APIs, SDKs & MCP Extensibility

Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems.

Testing, Debugging & Optimization

Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment.

Specialist automation

Browser & Computer Use

Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone.

Pricing snapshot

Sourced from the Index pricing dataset · open each vendor's profile for full detail.

Pricing
K
Kore.ai
S
Sierra

Entry price

Lowest public entry point

No public price. Essential, Advanced and Enterprise plans are sold through sales. Outcome based (per resolution) · contact sales

Pricing confidence

How public the numbers are

Contact only Contact only

Billing

Primary billing axis

Hybrid. Automation AI and Search AI bill per 15 minute session, and Contact Center AI and Agent AI bill per agent seat. Outcome based, charged per resolution or other outcome, such as a saved cancellation or a completed upsell.

Variable cost

Workload / overage exposure

Medium variable cost High variable cost

Free tier / trial

Try before you buy

Free tierTrial
No free tier

Buying motion

Self-serve vs sales call

Mixed Sales call

Pricing verified

When this pricing was last checked

Product updates

Newest first, each linked to its source.

Kore.ai

  • · Agent capability

    Version 1.8.3 of the Kore.ai agent platform lets a voice agent send the caller a WhatsApp message with tappable options, such as appointment slots, while the call is still live.

    Source
  • · Human approval / guardrails

    Version 1.8.0 of Kore.ai's agent platform adds three approval modes to Autoloop: Autopilot applies changes automatically, Copilot applies them only after a person approves, and Advisor only suggests changes.

    Source
  • · Human approval / guardrails

    A Human Task node for process workflows arrived in version 1.7.0 of Kore.ai's agent platform.

    Source

Sierra

  • · Human approval / guardrails

    Compliance Console, built into the Horizon platform, sets the rules Sierra agents follow when they reach out to customers by phone, text or email.

    Source
  • · Agent capability

    Sierra launched fleming-1, a model of its own that detects when the caller on a phone call is another agent by assessing whether the voice is synthetic while the call is still happening.

    Source
  • · Security / enterprise

    Sierra achieved AIUC-1 certification after an independent audit by Schellman and testing by the Artificial Intelligence Underwriting Company.

    Source

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