Clerk vs Fly.io Pricing | Costbench
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Team size
25 seats

Clerk vs Fly.io

Developer Tools pricing comparison · 2026

Clerk pricing ranges from $0–$300/month, while Fly.io ranges from $29–$2500/month. Clerk is typically 88% more affordable, though your actual cost depends on tier and team size.

Visit
See pricing on each vendor's site
Above-the-fold path — each link opens the vendor's pricing page in a new tab.
Visit Clerk pricing
Discount programs →
Visit Fly.io pricing
Free plan limits → Discount programs →
Compare
2 products · Developer Tools
Side-by-side · live
Clerk
Clerk pricing information is not publicly available in structured tier format.
verified 11w ago
$19K $90K
View pricing →
Fly.io
Fly.
verified 5w ago
$19K $90K
View pricing →
Verdict · list-price math · year 1
Fly.io saves $30K vs Clerk · 25 seats
Cheapest $60K
Spread 34%
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Business
$90K/yr
year 1 license · $300/seat
Support: Premium
$60K/yr
year 1 license · $199/seat
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
$19K/yr
Vendr · n=24
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 10 sourced facts
7 hidden-cost · 3 review platforms
Last verified 2mo ago
Confidence Medium confidence
Sources 14 sourced facts
10 hidden-cost · 2 contract · Vendr median · 1 review platform
Last verified 1mo ago
Confidence High 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 · 03

Hidden costs

Each cost is severity-ranked, with the dollar range quoted from its source (Vendr, Reddit, TrustRadius, BBB, official docs) — never our estimate.

Beyond the sticker
Severity-ranked, sourced
5 documented
  • Additional Assistance
    99€ per hour
    1 source
  • Essential Add-on Features
    $500/mo+
    1 source
  • Overage for Monthly Active Users
    $0.02/month
    1 source
  • Unlimited Social Logins/SMS Codes
    1 source
  • B2B Authentication Enhanced Add-on
    $100/month
    1 source
5 documented
  • Unexpected Charges on "Free" Plan
    $25-$750
    3 sources
  • Charges for Idle/Unused Resources
    $25-$750
    2 sources
  • Support Plan Charges After Cancellation
    $29-$199/user/month
    1 source
  • Regional Bandwidth Pricing Variance
    5-15% of license costs
    1 source
  • GPU Hosting Premium
    40-65% premium over GPU alternatives
    2 sources
REF · 05

What users say

Aggregated, with sample sizes. We use whichever review platform has data.

User reviews
TrustRadius · Trustpilot · G2
TrustRadius
9.3out of 5 (812)
Trustpilot
4out of 5 (637)
G2
4.8out of 5 (126)
Best for
Developers and hobby projects getting started with authentication
Watch out
Desire for more integrations with other platforms.
Trustpilot
1.9out of 5 (17)
Best for
Developers and teams running Fly.io infrastructure with usage-based monthly billing
Watch out
Unexpected charges on free/trial plans
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
Visit Clerk pricing
Discount programs →
Visit Fly.io pricing
Free plan limits → Discount programs →
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.
Developer Tools

Clerk

$0–$300
/month
4 plans · Free tier
Full pricing breakdown →
VS
Developer Tools

Fly.io

$29–$2500
/month
5 plans
Full pricing breakdown →

Plan-by-Plan Pricing

Plan Clerk Fly.io
Hobby Free /month Custom
Pro $25 /month $29 /user/month
Business $300 /month $199 /user/month
Enterprise Custom $2.5K
Compliance Made Easy — $99 /user/month

What Users Say

Clerk

G2
4.8out of 5 (126)
Trustpilot
4out of 5 (637)
TrustRadius
9.3out of 10 (812)
Top complaints
  • Desire for more integrations with other platforms.
  • Pricing can become expensive, particularly with increased usage.
  • Insane high number of searches and recommendations leading to unexpected costs.

Fly.io

Trustpilot
1.9out of 5 (17)
Top complaints
  • Unexpected charges on free/trial plans
  • Charges for idle or failed deployments
  • Billing issues with no easy cancellation path

Hidden Costs

Beyond the sticker price — what catches buyers off guard.

Clerk 7 hidden costs

medium
Additional Assistance 99€ per hour
high
Essential Add-on Features $500/mo+
medium
Overage for Monthly Active Users $0.02/month
medium
Unlimited Social Logins/SMS Codes
medium
B2B Authentication Enhanced Add-on $100/month
See all Clerk hidden costs →

Fly.io 6 hidden costs

high
Unexpected Charges on "Free" Plan $25-$750
high
Charges for Idle/Unused Resources $25-$750
medium
Support Plan Charges After Cancellation $29-$199/user/month
medium
Regional Bandwidth Pricing Variance 5-15% of license costs
medium
GPU Hosting Premium 40-65% premium over GPU alternatives
See all Fly.io hidden costs →

Continue researching

Clerk

Fly.io

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