Evalgent

Iterate & improve voice agents safely

Validate prompt changes, model updates, and conversation improvements before releasing them to production. Test every update against real scenarios to ensure reliability does not break.

Small changes can break voice agents

Voice agents evolve continuously as teams update prompts, upgrade models, refine conversation flows, and introduce new campaigns. Even small changes can unintentionally disrupt existing workflows.

Common failures caused by agent updates

Greeting changes break conversation flow
Promotions confuse task logic
Prompt update causes intent errors
Agent forgets earlier information
New instructions override previous rules
Conversation becomes longer than expected
Agent starts skipping required steps
Greeting changes break conversation flow
Promotions confuse task logic
Prompt update causes intent errors
Agent forgets earlier information
New instructions override previous rules
Conversation becomes longer than expected
Agent starts skipping required steps
Responses become inconsistent
Previously working scenarios fail
Tool usage becomes unreliable
Agent repeats resolved questions
Fallback triggers more frequently
Context window gets exceeded
Tone shifts after prompt edits
Responses become inconsistent
Previously working scenarios fail
Tool usage becomes unreliable
Agent repeats resolved questions
Fallback triggers more frequently
Context window gets exceeded
Tone shifts after prompt edits

Why agent updates are risky

Even small changes can introduce unintended behavior. A prompt tweak or new greeting may:

Change how the agent interprets user intent
Disrupt existing conversation flows
Override important instructions
Introduce new failure patterns

Without structured testing, teams cannot know whether an update improved the agent or broke something else.

Before updateAgent v1
Overall reliability84%
Booking flow
Cancellation
Billing enquiry
Account lookup
Transfer request
Complaint handling
Prompt updated
After updateAgent v2
Overall reliability69%
Booking flow
Cancellation
Billing enquiry
Account lookup
Transfer request
Complaint handling

How we solve them

Test updated agent versions

Run the same scenarios against different agent versions to reveal how updates affect reliability. Compare prompt changes, model upgrades, and flow modifications side by side.

Version comparison2 versions
Agent v184%
Booking flow
Cancellation
Billing
Complaint
Agent v269%
Booking flow
Cancellation
Billing
Complaint
3 scenarios regressed after update

Detect performance changes

Measure reliability across versions. Teams immediately see whether updates improved or degraded performance with clear metrics and trend analysis.

Reliability report
Loan enquiry
82%71%
Account setup
91%93%
Card block
88%64%
Balance check
95%94%
Overall change−6.25%

Identify regression failures

Updates often break previously working scenarios. Evalgent highlights regressions early so teams can fix issues before they reach production.

Regression alerts3 found
Cancellation flow
PassFail
Billing enquiry
PassFail
Transfer request
PassFail

Previously passing scenarios that now fail after the agent update.

Safely test business changes

Many agent updates are business-driven — festive greetings, promotional offers, new product messaging. Evalgent ensures these updates do not break the original task flow.

Business change impact
Festive greeting
No regressions
Promo offer inject
1 scenario affected
New product FAQ
No regressions
Holiday hours update
No regressions

Built for teams continuously improving voice agents

Voice Agent Service Providers

Validate every agent update before pushing to client environments. Build trust with evidence-backed releases.

In-house AI Teams

Move faster without breaking things. Know exactly how prompt or model changes affect real conversations.

Voice Agent Platforms

Protect platform reputation at scale. Automatically enforce quality standards across every agent release.

Know if your voice agent is ready for production