Agentic Index
Kastle vs Salient (2026)
Both build compliant voice agents for lending and Salient documents considerably more, at 9 of 14 against Kastle's 6.
Salient is built for US consumer lending with borrower level memory, in call payment execution writing back to servicing systems, real time FDCPA, CFPB and TCPA enforcement and a self serve Agent Studio with automated policy testing, across more than 39 million interactions. Kastle is mortgage and loan servicing specific, covering payment collection, escrow questions, borrower verification, delinquency recovery and loan qualification across call, text, email and webchat with pre trained regulatory compliance and roughly seven day integration. Salient for depth, Kastle for mortgage specificity and speed to live.
Choose Kastle if
- Mortgage and loan servicing is the whole scope and escrow questions are a real call type for you.
- A seven day integration matters because you need this live this quarter.
- Webchat alongside voice covers the channel mix your borrowers use.
Choose Salient if
- Documented coverage is materially deeper, which shows in a regulated deployment.
- In call payment execution with write back to servicing is the capability you need.
- Real time FDCPA, CFPB and TCPA enforcement is a compliance requirement you can point at.
| At a glance | Kastle | Salient |
|---|---|---|
| Category | Voice agent | Voice agent |
| Entry price | Contact sales | Contact sales |
| Free / trial | Not published | Pilot approach (single portfolio and agent) |
| Pricing confidence | contact only | contact only |
| Feature | K Kastle |
S Salient |
|---|---|---|
| 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. |
Full / Explicit | Full / Explicit |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
Full / Explicit | Full / Explicit |
|
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. |
Full / Explicit | Full / Explicit |
| 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. |
No / Not documented | No / Not documented |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
No / Not documented | Full / Explicit |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Partial | Partial |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Full / Explicit | Full / Explicit |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Partial | Full / Explicit |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
No / Not documented | No / Not documented |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
Full / Explicit | Full / Explicit |
| 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. |
No / Not documented | No / Not documented |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
No / Not documented | Partial |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
No / Not documented | Full / Explicit |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing | K Kastle |
S Salient |
|---|---|---|
|
Entry price Lowest public entry point |
Contact sales | Contact sales |
|
Pricing confidence How public the numbers are |
Contact only | Contact only |
|
Billing Primary billing axis |
enterprise contract | enterprise contract |
|
Variable cost Workload / overage exposure |
Medium variable cost | Medium variable cost |
|
Free tier / trial Try before you buy |
No free tier
|
No free tierTrial
|
|
Buying motion Self-serve vs sales call |
Sales call | Sales call |