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Developer Tools · head to head

Blacksmith vs Doppler

Blacksmith logo

Blacksmith

Developer Tools

2x faster GitHub Actions with 60% cost savings

From
Free
Rated
-
Full reviewWebsite
Doppler logo

Doppler

Cybersecurity

Secrets management for humans and AI agents

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Blacksmith per-minute pricing model requires estimating usage to predict costs; Doppler developer tier limited to 3 free users with per-user fees beyond that
  • They diverge on capability: Blacksmith covers Bare metal runners, Doppler covers Secrets management.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Blacksmith and Doppler actually diverge.

Attributes where Blacksmith and Doppler differ
AttributeBlacksmithDoppler
PlatformsGitHub Actions, Linux, Windows, macOSWeb, CLI, Cloud, On-Premises
CategoryDeveloper ToolsCybersecurity

Identical on both: starting price (Free), pricing model (Unknown), free tier (Yes), 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 Blacksmith

  • Bare metal runners
  • Multiple OS support
  • ARM support
  • Docker layer caching
  • Sticky disks
  • GitHub Actions observability
  • Free tier
  • Static IPs

Only in Doppler

  • Secrets management
  • Automated credential rotation
  • Dynamic secrets
  • Audit logging
  • SAML SSO
  • Role-based access control
  • Config syncing
  • AI agent support

What people use each for

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

Blacksmith

  • Replacing GitHub Actions runners with faster, cheaper infrastructurenot Doppler
  • Accelerating CI build times for organizations with heavy CI loadnot Doppler
  • Reducing cloud spend on GitHub Actions by 60% or morenot Doppler
  • Supporting ARM architecture builds without GitHub runnersnot Doppler

Doppler

  • Managing API keys for distributed development teamsnot Blacksmith
  • Securing credentials for AI agents without per-agent feesnot Blacksmith
  • Automating credential rotation for compliancenot Blacksmith
  • Centralizing secrets across cloud and on-premise infrastructurenot Blacksmith

Where each one falls short

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

Blacksmith

  • Per-minute pricing model requires estimating usage to predict costs
  • macOS M4 pricing ($0.08/min) is significantly higher than GitHub Actions
  • Docker layer caching and sticky disks are paid add-ons at $0.50/GB/mo
  • Static IP add-on costs $100/IP/mo

Doppler

  • Developer tier limited to 3 free users with per-user fees beyond that
  • Team plan pricing ($21/user/mo) adds cost for large teams
  • 90-day activity log retention may be insufficient for long-term audits
  • Enterprise plan requires custom pricing conversation

Pricing, plan by plan

Blacksmith

Free
  • Ubuntu x64$0.004/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads
  • Ubuntu ARM$0.0025/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads
  • Windows x64$0.008/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads
  • macOS M4$0.08/minute
    • 3,000 free minutes per month
    • 2x faster hardware
    • 4x faster cache downloads

Doppler

Free
  • DeveloperFree
    • 3 free users
    • Then $8 per additional user per month
    • Doppler CLI access
  • Team$21/month
    • Per-user pricing
    • Change requests
    • SAML SSO
  • Enterprise$undefined/custom
    • Custom pricing scaled to team size
    • On-prem or cloud deployment
    • Custom permissions

Which should you pick?

Choose Blacksmith if

  • You need bare metal runners.
  • You want to start without paying.
  • You work on GitHub Actions, Linux, Windows, macOS.
  • You also want multiple os support.
Blacksmith review

Choose Doppler if

  • You need secrets management.
  • You want to start without paying.
  • You work on Web, CLI, Cloud, On-Premises.
  • You also want automated credential rotation.
Doppler review

Questions people ask

Is Blacksmith or Doppler better?
Neither clearly leads. Blacksmith starts at Free and Doppler at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Blacksmith or Doppler?
Blacksmith starts at Free and Doppler at Free.
Does Blacksmith or Doppler run on more platforms?
Blacksmith runs on GitHub Actions, Linux, Windows, macOS. Doppler runs on Web, CLI, Cloud, On-Premises.
Can I use Blacksmith for free?
Both have a free tier, so you can try either at no cost before committing.
What is Blacksmith best used for?
Blacksmith is most often used for replacing github actions runners with faster, cheaper infrastructure, accelerating ci build times for organizations with heavy ci load, reducing cloud spend on github actions by 60% or more, supporting arm architecture builds without github runners. Of those, replacing github actions runners with faster, cheaper infrastructure and accelerating ci build times for organizations with heavy ci load are not what Doppler is typically brought in for.
What can Blacksmith do that Doppler cannot?
Blacksmith covers Bare metal runners, Multiple OS support, ARM support, Docker layer caching. Doppler covers Secrets management, Automated credential rotation, Dynamic secrets, Audit logging.

Answered from the vendors’ own pages

Blacksmith: How much do Blacksmith runners cost compared to GitHub Actions?

Blacksmith offers 60-75% cost savings depending on OS. Ubuntu x64 costs $0.004/min vs GitHub at $0.012/min. All plans include 3,000 free minutes monthly.

Source
Doppler: Do AI agents count toward my user limit?

No, AI agents and non-human identities receive free access across all Doppler plans, including Developer, Team, and Enterprise.

Source
Blacksmith: Can I use Docker layer caching with Blacksmith?

Yes, Docker layer caching is available as an add-on at $0.50/GB/mo. Managed Docker layer persistence is included with the base service.

Source
Doppler: What is the difference between Team and Enterprise plans?

Team plan ($21/user/mo) includes SAML SSO, role-based access controls, and 90-day logs. Enterprise adds custom deployment options, unlimited config syncs, 99.95% SLA, and a dedicated account manager.

Source
Blacksmith: What is the SLA for Enterprise plans?

Enterprise Blacksmith plans include a 99.9% SLA guarantee along with 24/7 priority support, dedicated Slack channels, white-glove onboarding, and CI optimization support.

Source
Doppler: Can I rotate secrets automatically?

Yes, both Team and Enterprise plans support automatic secret rotation. Developer tier supports manual rotation only.

Source
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