PromptLayer vs LangWatch
AI Evaluation & Guardrails pricing comparison · 2026
PromptLayer pricing ranges from $0–$500/month, while LangWatch ranges from $0–$34/month. LangWatch is typically 65% more affordable, though your actual cost depends on tier and team size.
PromptLayer
AI Evaluation & Guardrails pricing intelligence
verified 9w ago
$10K
$150K
Verdict · list-price math · year 1
LangWatch
saves
$140K
vs
PromptLayer
· 25 seats
Cheapest
$10K
Spread
93%
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Team
$150K/yr
year 1 license · $500/seat
Growth
$10K/yr
year 1 license · $34/seat
REF · 01
Sources & confidence
Every dollar amount and contract clause below traces back to a sourced fact. We don't manufacture composite scores.
Where this data comes from
Vendr · TrustRadius · Reddit · BBB · official docs
Sources
5 sourced facts
4 hidden-cost · 1 contract
Last verified
2mo ago
Confidence
Limited confidence
Sources
5 sourced facts
4 hidden-cost · 1 contract
Last verified
2mo ago
Confidence
Limited confidence
REF · 02
Plans at a glance
Every tier per product. Lock one to drive the cost row above and reveal a tier-specific outbound CTA.
Tier ladder
Click a tier to lock the cost row to it. Locking surfaces a tier-specific Visit CTA.
REF · 04
Contract terms
The fine print, surfaced. Green = buyer-friendly. Each clause backed by a quoted source.
PromptLayer
LangWatch
Auto-renewal
—
Yes
Cancellation
at any time, effective at the end of the current paid term
30 days written notice before the end of the agreement after the initial period
Commitment
—
specified period (defined in individual contracts)
Price escalation
—
LangWatch may adjust pricing due to unforeseen cost increases, with 30 days' written notice.
Can downgrade
—
—
REF · 05
What users say
Aggregated, with sample sizes. We use whichever review platform has data.
User reviews
TrustRadius · Trustpilot · G2
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
License cost is computed from publicly listed plans (real math, list price × seats).
Median annual cost is from Vendr's deal flow when available — see source badges.
Hidden costs and contract terms each cite their own sources. We do not invent composite scores.
VS
PromptLayer and LangWatch both operate in the ai evaluation category. This page compares their published pricing.
Plan-by-Plan Pricing
| Plan | PromptLayer | LangWatch |
|---|---|---|
| Free | Free /month | Free /user/month |
| Pro | $49 /month | $34 /core-seat/month |
| Team | $500 /month | Custom |
| Enterprise | Custom | — |
Contract Terms
| Term | PromptLayer | LangWatch |
|---|---|---|
| Auto-renewal | — | Yes |
| Cancellation | at any time, effective at the end of the current paid term | 30 days written notice before the end of the agreement after the initial period |
| Minimum commitment | — | specified period (defined in individual contracts) |
| Price escalation | — | LangWatch may adjust pricing due to unforeseen cost increases, with 30 days' written notice. |