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Cloud · head to head

Koyeb vs PromptLayer

Koyeb logo

Koyeb

Cloud

High-performance serverless infrastructure for APIs, inference, and databases

From
$29/month
Free plan
No
Full reviewWebsite
PromptLayer logo

PromptLayer

AI

Collaboration platform for prompt management, evaluation, and observability

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only PromptLayer has a free tier, so it costs nothing to try first.
  • Each has a real cost: Koyeb pricing starts at $29/month with additional compute costs; PromptLayer the free plan is capped at only 2,500 requests per month, quite limited for active production use.
  • They diverge on capability: Koyeb covers Serverless containers, PromptLayer covers Visual prompt management.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Koyeb and PromptLayer actually diverge.

Attributes where Koyeb and PromptLayer differ
AttributeKoyebPromptLayer
Starting price$29/monthFree
Pricing modelUnknownfreemium
Free tierNoYes
PlatformsWeb, CLI, APIweb, api
CategoryCloudAI

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Koyeb

  • Serverless containers
  • GPU support
  • Global distribution
  • Multi-protocol support
  • Serverless Postgres
  • Zero-downtime deployments

Only in PromptLayer

  • Visual prompt management
  • Agent observability
  • Evaluations
  • Version control
  • Cost and latency monitoring
  • Agent workflow tracing

What people use each for

The jobs each tool is most often brought in to do.

Koyeb

  • Deploying AI inference models globally with GPU accelerationnot PromptLayer
  • Building SaaS platforms with automatic scalingnot PromptLayer
  • Running distributed AI agents and background workersnot PromptLayer

PromptLayer

  • Versioning and deploying prompts without code redeploysnot Koyeb
  • Running evaluations with human review before production releasenot Koyeb
  • Tracing multi-step agent workflows for debuggingnot Koyeb
  • Monitoring LLM cost and latency by featurenot Koyeb

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Koyeb

  • Pricing starts at $29/month with additional compute costs
  • GPU compute is expensive at $0.75-$2.50 per hour
  • Limited customization for infrastructure configuration

PromptLayer

  • The free plan is capped at only 2,500 requests per month, quite limited for active production use.
  • The Team plan jumps to $500/month, a large step up from the $49/month Pro plan.
  • Overage transaction fees apply on top of subscription costs, which can make total spend less predictable.
  • Enterprise-grade features like HIPAA BAAs and custom deployment require contacting sales.

Pricing, plan by plan

Koyeb

$29/month
  • Pro$29/month
    • $10 included compute
    • 10 users
    • 100 services
  • Scale$299/month
    • $100 included compute
    • 50 users
    • 1,000 services
  • Enterprise$1000/month
    • Unlimited users
    • Custom resources
    • SSO/RBAC

PromptLayer

Free
  • FreeFree
    • 5 users
    • 2,500 requests/month
    • 1 workspace
  • Pro$49/month
    • Unlimited playgrounds and workspaces
    • 150MB datasets
    • Pay-as-you-go overage at $0.003/transaction
  • Team$500/month
    • 25 users
    • 100k+ monthly requests
    • Webhooks
  • Enterprise$undefined/mo
    • Custom limits
    • Role-based access controls
    • HIPAA with BAA

Which should you pick?

Choose Koyeb if

  • You need serverless containers.
  • You work on Web, CLI, API.
  • You also want gpu support.
Koyeb review

Choose PromptLayer if

  • You need visual prompt management.
  • You want to start without paying.
  • You work on web, api.
  • You also want agent observability.
PromptLayer review

Questions people ask

Is Koyeb or PromptLayer better?
Neither clearly leads. Koyeb starts at $29/month and PromptLayer at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Koyeb or PromptLayer?
PromptLayer has a free tier; the other does not. Paid plans start at $29/month for Koyeb and Free for PromptLayer.
Does Koyeb or PromptLayer run on more platforms?
Koyeb runs on Web, CLI, API. PromptLayer runs on web, api.
Can I use PromptLayer for free?
Yes. PromptLayer has a free tier, so you can try it without paying. Koyeb starts at $29/month.
What is Koyeb best used for?
Koyeb is most often used for deploying ai inference models globally with gpu acceleration, building saas platforms with automatic scaling, running distributed ai agents and background workers. Of those, deploying ai inference models globally with gpu acceleration and building saas platforms with automatic scaling are not what PromptLayer is typically brought in for.
What can Koyeb do that PromptLayer cannot?
Koyeb covers Serverless containers, GPU support, Global distribution, Multi-protocol support. PromptLayer covers Visual prompt management, Agent observability, Evaluations, Version control.

Answered from the vendors’ own pages

Koyeb: What are Koyeb's subscription plans?

Pro plan is $29/month with $10 included compute, Scale plan is $299/month with $100 included compute and 99.9% SLA, and Enterprise starts at $1,000/month with unlimited users and 99.99% SLA.

Source
PromptLayer: What does PromptLayer cost?

PromptLayer has a free plan, a Pro plan at $49/month, a Team plan at $500/month, and custom Enterprise pricing, with additional usage billed per transaction beyond plan limits.

Source
Koyeb: How much does GPU compute cost?

GPU pricing is per-second: RTX-A6000 costs $0.75/hour, A100 costs $1.60/hour, H100 costs $2.50/hour, and 8x H100 costs $20.00/hour.

Source
PromptLayer: Is there a free plan, and what are its limits?

The Free plan includes 5 users, 2,500 requests per month, 1 workspace, 250 monthly eval cell executions, and datasets up to 10MB.

Source
Koyeb: What database options are available?

Koyeb offers serverless Postgres starting at free (0.25 vCPU, 1GB RAM) up to 3XL at $1.28/hour with 8 vCPU and 32GB RAM. Storage costs $0.50/month per GB.

Source
PromptLayer: How is usage metered beyond the plan limits?

Additional usage is charged per transaction for requests, agent runs, and evaluation cell runs, at $0.003/transaction on Pro and $0.002/transaction on Team.

Source
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