LangGraph Platform vs Stack AI
AI Agent Platforms pricing comparison · 2026
LangGraph Platform pricing ranges from $0–$39/per seat / month + usage, while Stack AI uses custom pricing.
LangGraph Platform
LangGraph Platform offers three pricing tiers in 2026.
verified 9w ago
View pricing →
Stack AI
Stack AI offers a Free plan at no cost, making it accessible for individuals and teams beg
verified 9d ago
View pricing →
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Usage-based
$2.5 per 1K traces
see vendor pricing for volume tiers
Pricing model unknown
Pricing model unknown
no public list price found
What buyers actually pay
median, annual
Vendr deal-flow data. The real benchmark, not list price.
No Vendr data
—
Not in Vendr's deal flow
Median annual
$500/yr
Vendr · n=38
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
8 sourced facts
7 hidden-cost · 1 contract
Last verified
2mo ago
Confidence
Medium confidence
Sources
14 sourced facts
11 hidden-cost · 1 contract · Vendr median · 1 review platform
Last verified
1w ago
Confidence
Medium 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.
LangGraph
Stack
Auto-renewal
Yes
Yes
Cancellation
at least 30 days before the end of the then-current Subscription Term
at least fourteen (14) days before the end of the current term
Commitment
For the Plus plan, the minimum commitment is effectively the per-seat cost of $39 per user per month; for the Enterprise plan, pricing and terms are custom-negotiated, starting around $100,000+ annually.
one-year terms
Price escalation
—
—
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
LangGraph Platform and Stack AI both operate in the ai agent platforms category. This page compares their published pricing.
Plan-by-Plan Pricing
| Plan | LangGraph Platform | Stack AI |
|---|---|---|
| Developer | Free /month | Free /month |
| Plus | $39 /per seat / month | Custom |
| Enterprise | Custom | — |
Contract Terms
| Term | LangGraph Platform | Stack AI |
|---|---|---|
| Auto-renewal | Yes | Yes |
| Cancellation | at least 30 days before the end of the then-current Subscription Term | at least fourteen (14) days before the end of the current term |
| Minimum commitment | For the Plus plan, the minimum commitment is effectively the per-seat cost of $39 per user per month; for the Enterprise plan, pricing and terms are custom-negotiated, starting around $100,000+ annually. | one-year terms |