Spacelift vs Kernel
Detailed side-by-side comparison to help you choose the right tool
Spacelift
Cloud & Hosting
Revolutionary Infrastructure-as-code orchestration platform that manages Terraform, OpenTofu, Pulumi, Ansible, and CloudFormation workflows with policy-as-code, drift detection, and concurrency-based pricing that won't surprise you.
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EnterpriseKernel
🔴DeveloperCloud & Hosting
Managed browser infrastructure purpose-built for AI agents — spin up isolated Chrome sessions in seconds, with recording, captcha handling, and persistent state.
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Spacelift - Pros & Cons
Pros
- ✓Concurrency-based pricing is dramatically cheaper than Terraform Cloud's per-resource model — users report 3-5x cost reductions on real workloads
- ✓Genuine multi-IaC support means you manage Terraform, Ansible, and Pulumi stacks in one platform instead of three separate tools
- ✓OPA policy-as-code integration gives real teeth to infrastructure governance — not just advisory warnings, actual blocking policies
- ✓Private workers run in your VPC with outbound-only connections, solving the 'state leaving our network' problem cleanly
- ✓The free plan includes enough to evaluate with a real project — not just a 14-day trial that pressures you into buying
- ✓Strong customer support with dedicated Slack channels and CSMs on Business/Enterprise plans — users consistently praise responsiveness
Cons
- ✗Custom pricing with no published numbers makes it impossible to estimate costs without talking to sales first
- ✗Overkill for small teams — if you have 2 developers and 50 resources, Atlantis or vanilla Terraform Cloud may be simpler
- ✗The learning curve for OPA policies is real: Rego is a niche language that most teams need to learn from scratch
- ✗Some users report rough edges with permission models, particularly around state locking and maintainer access
- ✗No transparent pricing comparison possible — you have to get quotes from both Spacelift and competitors to compare
- ✗Audit trail is Enterprise-only, which means compliance-focused mid-market teams get pushed to the most expensive tier
Kernel - Pros & Cons
Pros
- ✓Eliminates the six-month infra project of running a production headless-Chrome pool
- ✓Works with existing Playwright / Puppeteer code — no SDK lock-in
- ✓Captcha + residential proxy handling meaningfully improves scraping success rates
- ✓Replay UI is a huge productivity win for debugging agent trajectories
- ✓Free hobby tier makes prototyping cheap
Cons
- ✗Usage-based pricing scales with browser-minutes — long-running research agents can get expensive fast
- ✗Managed service (no self-host) — regulated customers may need to wait for VPC deploy
- ✗Newer than Browserbase and Steel; smaller community for Stack Overflow-style questions
- ✗Captcha solving still probabilistic — some highly protected targets will fail
Not sure which to pick?
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