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  7. Stack Auth

Stack Auth logo

Stack Auth

Partially Agent-Ready
Agent-Ready SaaS Index · stack-auth.com · scored 2026-05-09 · rubric v2.0
Score 49 / 100
Customer Identity And Access Management Ciam
Public API

Stack Auth scores 49/100 on xpay's Agent-Ready Index v2: partial pricing visibility; self-serve checkout is available; a free entry path exists.

See Stack Auth pricing summaryLive pricing page
Pricing
Stack Auth pricing
As of 2026-05-09 · stack-auth.com/pricing
Free
Free
forever
Self‑hosted open source authentication
Team
$49/mo
flat
Custom branding
SSO with OIDC/OAuth
Unlimited users, teams, projects
Growth
$299/mo
flat
Custom branding
SSO with OIDC/OAuth
Priority support
Unlimited users, teams, projects
Score breakdown · rubric v2.0
How Stack Auth scores on the agent-ready dimensions

Public pricing visibility

15 / 15

Self-serve checkout

15 / 15

Public API + docs

0 / 20

Usage-based / metered pricing

0 / 20

Free entry path

7 / 7

No sales call required

7 / 7

Card / wallet / x402 payment

5 / 6

Machine-readable bonus (MCP / OpenAPI)

0 / 10

Total
49 / 100
Effective pricing
What it actually costs at typical scale
Team plan for a small startup
$49/mo
· Team tier selected· Managed hosting usage up to 10K users
Confidence: high
Growth plan for a growing business
$299/mo
· Growth tier selected· Unlimited users, teams, and projects
Confidence: high
Agent purchase verdict
Can an autonomous agent transact here?
Agent-ready
LLM score: 70/100

Can create account

Yes

Can enter payment method

Yes

Can upgrade plan

Yes

Can buy more usage

Yes

Can cancel online

Yes

Payment methods

card

Human approval recommended

No

Pricing transparency

full

Purchase motion

self_serve

Demo required

No

Quote required

No

Annual commit required

No

Auto-renewal mentioned

No

Cancellation policy visible

No

Refund policy visible

No

Invoice payment available

No

Purchase orders supported

No

MSA required

No

DPA available

No

Security review required

No

Enterprise signals
Trust & compliance

SSO / SAML

Yes

RBAC

Unknown

Audit logs

Unknown

Competitive intel
Positioning & ecosystem
Headline

“Simple plans for everyone”

Buyer persona

smb
mid market

Agent purchase simulation
Six-step check: can an agent actually buy from Stack Auth?
✓

Discover price

✓

Select a plan

✗

Pay per task

✓

Avoid a sales call

◐

API docs without auth

✗

Estimate cost upfront

Analysis
Pros and cons for AI agents
Observational summary written by xpay from the signals captured on 2026-05-06. Not a review of the product — only of its current pricing posture for agent buyers.
✓ For an AI agent
  • Pricing is publicly visible on an indexable page — agents can read tiers without scraping past auth.
  • Every advertised tier is self-serve; no tier requires scheduling a call.
◐ Opportunities for the provider
  • No per-unit price was advertised, so an agent has no way to estimate the cost of a single task.
  • API documentation is gated or absent; an agent cannot inspect the integration surface without authentication.
  • No /.well-known/ai-pricing.json or equivalent machine-readable pricing manifest is published — agents must rely on HTML scraping.
One-line fix
How Stack Auth could lift its score

Add a per-unit price (e.g. $X / 1K calls) to the pricing page so an agent can compute its own cost before committing.

pricing_visible

true

headline_phrasing

Stack Auth — Either self-host for free, or use our managed hosting with no surprise bills

tier_count

3

lowest_paid_entry_usd

49

free_tier

false

free_tier_terms

null

per_unit_price

null

annual_required

false

self_serve_paid_tiers

0

sales_only_tiers

1

public_api_docs_url

https://docs.stack-auth.com/docs/overview

api_docs_auth_walled

false

ai_pricing_json_present

false

agents_txt_present

false

anonymous_purchase_path

false

per_unit_classification

null

usage_headline_present

false

custom_tier_present

false

agent_friendly

{"ai_pricing_json":false,"agents_txt":false,"llms_txt":false,"sitemap_xml":false,"mcp_server_card":false,"agent_skills_index":false,"x402_supported":false}

View raw extracted page text →
CTAs (22): Docs · Pricing · Feedback · Blog · Discord · Sign in · Sign up · Get Started · Can I integrate Stack into my existing project? · How do I sync user data with my database? · Can I deploy Stack on my own servers? · How can I integrate Stack into my backend?
Price tokens (8): $49 / moFor early startups · $299 / moFor growing busines · $49 · $49 · $49 · $49 · $99 · $99
DocsPricingFeedbackBlogDiscordSign inSign upDocsPricingFeedbackBlogDiscordSign inSign upPricing plansSimple plans for everyoneEither self-host for free, or use our managed hosting with no surprise billsFreeFreeFor individualsGet StartedTeam$49 / moFor early startups and small teamsGet StartedGrowth$299 / moFor growing businesses and teamsGet StartedUsageUsageUsageUsageNumber of users10K10K users50K50K usersUnlimitedUnlimited usersNumber of teamsUnlimitedUnlimited teamsUnlimitedUnlimited teamsUnlimitedUnlimited teamsNumber of projectsUnlimitedUnlimited projectsUnlimitedUnlimited projectsUnlimitedUnlimited projectsNumber of dashboard admins11 dashboard admin3 (then $49 each)3 dashboard admins (then $49 each)5 (then $49 each)5 dashboard admins (then $49 each)FeaturesFeaturesFeaturesFeaturesCustom brandingCustom brandingCustom brandingCustom brandingSSO with OIDC/OAuthSSO with OIDC/OAuthSSO with OIDC/OAuthSSO with OIDC/OAuth# SAML SSO connectionsNo SAML SSO connectionsNo SAML SSO connections3 (then $99 each)3 SAML SSO connections (then $99 each)SupportSupportSupportSupportPriority supportNo priority supportPriority supportPriority supportPremium supportNo premium supportNo premium supportPremium supportFrequently Asked QuestionsCan I integrate Stack into my existing project?Yes! It is very straightforward! Stack does not require any special architecture and can merge well into any Next.js project that uses the App router.How do I sync user data with my database?Can I deploy Stack…
You work at Stack Auth?
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Are you Stack Auth? Something off in this listing?
Agent-Ready Spec
Stack Auth
Partially Agent-Ready

49

/ 100 (rubric v2.0)
Category

Customer Identity And Access Management Ciam

Pricing model

Stack Auth — Either self-host for free, or use our managed hosting with no surprise bills

Tier count

3

Free tier

No

Lowest paid entry

$49/mo

Self-serve / sales-only tiers

0 / 1

Public API docs

Public

Anonymous purchase path

No

Machine-readable pricing

Not published

Last refreshed

2026-05-09

Pricing intelligenceInsights extracted from stack-auth.com/pricing
Pricing model

Tier-based subscription

Agent-purchase verdict
Agent-ready
70/100 · v2.1
Canonical answer

Stack Auth pricing starts at $0/mo for the Free plan; paid plans range from $49/mo for the Team plan to $299/mo for the Growth plan. Billed monthly.

Cheapest entry

Free plan (Free)

Actions
Open live pricing page
Verdict reflects Partially Agent-Ready status under rubric v2.0. Source observed at https://stack-auth.com/pricing.
Agent-friendly features0 of 7 present
Discovery files and protocols
Side-channel signals — informational, not part of the score. Each protocol is independent; adoption signals the publisher is thinking about agent buyers.

ai-pricing.json

agents.txt

llms.txt

sitemap.xml

MCP Server Card

Agent Skills

x402 / MPP

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CompanyAgentically Inc. (d/b/a xpay✦)1875 Mission St, Ste 103San Francisco, CA 94103, United Stateslegal@xpay.sh · privacy@xpay.sh
or ask your AI app
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