How much does Kastle cost?

Demo led enterprise sales; awards and enterprise references available on request; no rates published in retrieved materials.

What are the best alternatives to Kastle?

Based on documented capability coverage across the Agentic Index 14 point taxonomy, the closest alternatives to Kastle among voice agents are Sonant, Hello Patient, Broccoli, Casca. Each is graded on the same public evidence, and no vendor pays for placement.

Does Kastle give you tracing and observability into agent runs?

Partial under the Agentic Index verification standard. Kastle publishes some public evidence of logging or observability, but narrower than full tracing and auditability across agent runs. Evidence basis: The platform advertises audit-ready oversight for compliance, short of a documented run visibility or analytics dashboard, Kastle materials 2026-07-22. Graded from public evidence only against the Agentic Index 14 point capability taxonomy. No vendor pays for placement.

Does Kastle require human approval before an agent acts?

Partial under the Agentic Index verification standard. Kastle publishes some public evidence of guardrails or oversight, but narrower than a documented human approval step before an agent acts. Evidence basis: Agents qualify loan inquiries as an initial filter before a human loan officer is involved and route specific inquiries to human call centers, implying escalation without documented approval gate mechanics, Kastle and third party materials. Graded from public evidence only against the Agentic Index 14 point capability taxonomy. No vendor pays for placement.

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Kastle

Q: Who is Kastle for?

mortgage servicers, independent mortgage banks, FDIC-insured banks, consumer lenders

Q: Does Kastle have SOC 2, SSO and role based access control?

Full under the Agentic Index verification standard. Kastle publishes public evidence of enterprise security and identity controls, covering a compliance posture such as SOC 2 or ISO 27001, single sign on (SSO or SAML), and role based access control (RBAC). Evidence basis: Models are pre-trained to comply with stringent mortgage lending regulations with audit-ready oversight, and agents verify new borrowers for secure and compliant operations, Kastle materials 2026-07-22. Graded from public evidence only against the Agentic Index 14 point capability taxonomy. No vendor pays for placement.

Also known as: Kastle AI, kastle.ai, Kastle mortgage

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Voice agentindependentVerified 2026-07-22

Entry priceContact salesFull pricing detail

AI voice agents purpose-built for mortgage and loan servicing: payment collection, escrow questions, borrower verification, delinquency recovery, and loan qualification across call, text, email, and webchat, with pre-trained regulatory compliance and ~7-day integration. LendingTree 2024 Innovation Challenge winner; live in large mortgage operations.

Kastle builds AI voice agents purpose-built for mortgage and loan servicing, automating the repetitive but high-stakes borrower phone interactions that constrain servicers by headcount.

Its agents guide borrowers through payment collection across varied methods and schedules, answer escrow and account questions, verify new borrowers during onboarding, engage early-delinquent borrowers with low-friction ways to pay and resolve accounts, and qualify new loan inquiries as an initial filter before a human loan officer is involved.

The models are pre-trained to comply with stringent mortgage lending regulations, with audit-ready oversight, and the platform runs 24/7 across call, text, email, and webchat, absorbing call-volume spikes and routing inquiries to the right lending or servicing partner.

Positioned as one of the most deployed voice agents in the mortgage industry, Kastle serves FDIC-insured banks and independent mortgage banks, and a partnership with Haven lets servicers deliver the whole experience under the original lender's brand through a single phone number. Vendor and press reported outcomes include call center cost reductions of 80-90% and integration going live in roughly seven days. Founders Rishi Choudhary and Nitish Poddar bring mortgage-technology and AI-systems backgrounds from Redfin and Verkada. Winner of LendingTree's 2024 Innovation Challenge.

Vendor details

Canonical URL

https://www.kastle.ai

Funding status

Venture backed; live deployments inside some of the largest mortgage operations in the country; winner of LendingTree's 2024 Innovation Challenge; highlighted in a16z's February 2025 fintech newsletter; strategic partnership with Haven (branded servicing). Co-founded by Rishi Choudhary (built Redfin's Mortgage Marketplace) and Nitish Poddar (patented systems at Verkada)

Company status

independent

Use cases & customers

Primary use cases

mortgage payment collection and escrow questionsearly-delinquency engagement and collections recoveryborrower verification and onboardingnew loan inquiry qualification24/7 branded borrower servicing

Target customers

mortgage servicersindependent mortgage banksFDIC-insured banksconsumer lenders

Deployment options

cloud platform, live in about seven daysout-of-the-box compliant agentswhite-label under the lender's brand (via Haven partnership)

Integrations

Seamless integrations with audit-ready oversight and a typical integration time of about seven days; routes specific inquiries to the appropriate lending or servicing call centers; via the Haven partnership, gives homeowners a single branded phone number for account issues, servicing questions, and lender inquiries; operates across call, text, email, and webchat.

Sources & related URLs

Research sources

https://www.kastle.ai/ https://www.fintechfutures.com/press-releases/haven-partners-with-kastle-to-streamline-the-mortgage-servicing-experience-with-ai-powered-voice-agents https://www.chrismancommentary.com/post/ai-agents-reshaping-mortgage-lending-servicing https://www.videosdk.live/ai-apps/kastle

Agentic Index coverage score

6.0 / 14 capabilities · 43%

Integrations & Tool Calling	Full
Seamless integrations with a typical seven-day integration time, routing inquiries to the appropriate lending or servicing call centers, and the Haven integration unifying servicing under the lender brand, Kastle and Business Wire materials 2026-07-22
Workflow Orchestration	Full
Agents complete servicing tasks end to end (guide payment collection across methods and schedules, verify borrowers, resolve delinquent accounts, qualify loan inquiries) and take action as non-deterministic LLM systems rather than scripted flows, Kastle and Chrisman Commentary materials 2026-07-22
Knowledge Grounding & RAG	Unable to verify
No knowledge grounding or retrieval layer documented; account context comes from servicing system integration, Kastle materials 2026-07-22
Human Oversight & Guardrails	Partial
Agents qualify loan inquiries as an initial filter before a human loan officer is involved and route specific inquiries to human call centers, implying escalation without documented approval gate mechanics, Kastle and third party materials 2026-07-22
Security, Identity & Governance	Full
Models are pre-trained to comply with stringent mortgage lending regulations with audit-ready oversight, and agents verify new borrowers for secure and compliant operations, Kastle materials 2026-07-22
Observability & Auditability	Partial
The platform advertises audit-ready oversight for compliance, short of a documented run visibility or analytics dashboard, Kastle materials 2026-07-22
Memory & State Persistence	Unable to verify
No persistent borrower or agent memory layer documented in retrieved materials, Kastle materials 2026-07-22
Deployment & Data Residency	Unable to verify
Cloud platform with rapid integration; no self hosting or data residency options documented, Kastle materials 2026-07-22
Prebuilt Agents, Templates & Packs	Full
Ships compliant out-of-the-box agents that go live in days, pre-trained for defined mortgage servicing workflows, Kastle materials 2026-07-22
Triggers & Channel Coverage	Full
Agents automate customer interactions 24/7 across call, text, email, and webchat, handling inbound plus outbound payment collection and delinquency outreach, Kastle materials 2026-07-22
Model Flexibility & Routing	Unable to verify
No customer facing model choice or routing documented; the compliance-tuned models are internal, Kastle materials 2026-07-22
APIs, SDKs & MCP Extensibility	Unable to verify
No public API, SDK, or MCP surface documented in retrieved materials, Kastle materials 2026-07-22
Testing, Debugging & Optimization	Unable to verify
No customer facing testing, simulation, or optimization tooling documented, Kastle materials 2026-07-22
Browser & Computer Use	Unable to verify
No browser or computer use capability documented; system access runs through integrations, Kastle materials 2026-07-22

The Agentic Index coverage score grades every vendor Full, Partial or Unable to verify against the same 14 buyer facing capabilities, from public evidence only. Each capability links to how all vendors in the index score on it. How this evidence is graded

Pricing

Contact sales

enterprise contract

What is public

The motion is public (demo led sales, out-of-the-box agents live in days, cost-per-call reduction framing of 80-90%); no rates or metering published in retrieved materials.

Variable cost rationale

No billing model published; per-call economics are implied by the cost-per-call framing but not documented as the billing basis.

Sales call required

Yes, required for paid access

Free / trial

Not published

Agentic Index verified 2026-07-22

Related vendors

Alternatives to Kastle

The closest documented capability profiles to Kastle among voice agents tracked by Agentic Index, ordered by similarity on the same 14 point evidence the rankings use. No vendor pays for placement.

Sonant6.0 / 14Adds documented Knowledge Grounding & RAG
Hello Patient6.5 / 14Adds documented Knowledge Grounding & RAG and Memory & State Persistence
Broccoli5.0 / 14Adds documented Testing, Debugging & Optimization
Casca6.5 / 14Adds documented Knowledge Grounding & RAG and Memory & State Persistence
FleetWorks5.5 / 14Adds documented Memory & State Persistence and Browser & Computer Use
Sameday6.5 / 14Adds documented Knowledge Grounding & RAG and Memory & State Persistence, among others

Similarity is computed from each vendor's Agentic Index coverage score evidence, axis by axis, not from the totals. How this evidence is graded

Compare Kastle with other vendors →Compare all voice agents →See where Kastle ranks →

Data confidence: high

Head to head

Kastle vs Salient