Developer Tools · head to head
Buildkite vs etcd
Buildkite
Developer Tools
CI/CD pipelines that run on your own compute
- From
- Free
- Free plan
- Yes
etcd
Technology
A distributed key-value store using Raft consensus, built for cluster coordination rather than application data.
- From
- On request
- Free plan
- No
The short version
- Only Buildkite has a free tier, so it costs nothing to try first.
- Each has a real cost: Buildkite free plan caps at 5 users and 10 concurrent jobs, with 2,000 Linux vCPU minutes per month and 30 day build retention; etcd it is sized for coordination data, not application data: the default backend quota is 2 GB and 8 GB is the documented recommended maximum, and exceeding it puts the cluster into a NOSPACE alarm where it accepts no writes until an operator compacts, defragments and clears the alarm by hand.
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which Buildkite and etcd actually diverge.
Identical on both: platforms (Web), 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 Buildkite
Nothing recorded that etcd does not also cover.
Only in etcd
- Raft consensus
- Linearizable reads
- Transactions
- Leases
- Watches
- MVCC revision history
- Role-based access control
- Snapshot backup and restore
What people use each for
The jobs each tool is most often brought in to do.
Buildkite
- CI/CD pipeline automationnot etcd
- Test execution at scalenot etcd
- Deployment automationnot etcd
etcd
- Storing Kubernetes cluster state, which is what the overwhelming majority of etcd deployments are doingnot Buildkite
- Leader election and distributed locking in a home-grown scheduler or control plane, using leases and transactionsnot Buildkite
- Service discovery and dynamic configuration where readers need to be notified of changes rather than poll for themnot Buildkite
- Coordinating failover in a clustered database, as Patroni does for PostgreSQLnot Buildkite
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Buildkite
- Free plan caps at 5 users and 10 concurrent jobs, with 2,000 Linux vCPU minutes per month and 30 day build retention
- Pro plan is $30 per active user per month, capped at 50 users, with only 10 of the up to 250 concurrent agents included before extra usage
- Enterprise plan enforces a 30 user minimum even though pricing itself is custom
- Hosted compute beyond included minutes is metered at $0.004 per vCPU minute on Linux and $0.02 per vCPU minute on Mac
etcd
- It is sized for coordination data, not application data: the default backend quota is 2 GB and 8 GB is the documented recommended maximum, and exceeding it puts the cluster into a NOSPACE alarm where it accepts no writes until an operator compacts, defragments and clears the alarm by hand.
- Every write is replicated and fsynced before acknowledgement, so cluster performance is bounded by the slowest disk in it; a member on network-attached storage with high fsync latency causes leader elections and cluster-wide latency spikes that look like network problems and are not.
- Adding members increases availability but reduces write throughput, because each write must reach a larger quorum; you run three or five members for fault tolerance, and increasing capacity means faster hardware rather than more nodes.
- There is no sharding and no multi-tenancy, so isolating workloads means running separate clusters, each with its own quorum, certificates, backup schedule and upgrade path, and that operational multiplication is often unexpected.
- Running it yourself is a real job: periodic compaction and defragmentation, snapshot backups you have actually rehearsed restoring, and rotation of both peer and client TLS certificates, none of which happens automatically outside a managed Kubernetes service.
- Losing quorum is not self-healing; recovering a cluster that has lost a majority means restoring from a snapshot and accepting that everything written since that snapshot is gone, which makes backup frequency a data-loss budget decision rather than a routine setting.
Pricing, plan by plan
Buildkite
Free- FreeFree
- Up to 5 users
- 10 concurrent jobs
- 2000 Linux vCPU minutes monthly
- Pro$30/month
- Up to 50 users
- 250 concurrent agents (10 included)
- 4000 Linux vCPU minutes monthly
- Enterprise$null/custom
- Unlimited users (30 minimum)
- Custom usage limits
- Full platform access
etcd
On requestNo published plan breakdown. See the etcd review.
Which should you pick?
Questions people ask
- Is Buildkite or etcd better?
- Neither clearly leads. Buildkite starts at Free and etcd at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Buildkite or etcd?
- Buildkite has a free tier; the other does not. Paid plans start at Free for Buildkite and On request for etcd.
- Does Buildkite or etcd run on more platforms?
- Both run on Web, so platform support will not decide this one for you.
- Can I use Buildkite for free?
- Yes. Buildkite has a free tier, so you can try it without paying. etcd starts at On request.
- What is Buildkite best used for?
- Buildkite is most often used for ci/cd pipeline automation, test execution at scale, deployment automation. Of those, ci/cd pipeline automation and test execution at scale are not what etcd is typically brought in for.
- What can Buildkite do that etcd cannot?
- etcd covers Raft consensus, Linearizable reads, Transactions, Leases.
Answered from the vendors’ own pages
Buildkite: Can I use Buildkite without paying?
Yes, Buildkite offers a free plan that includes up to 5 users, 10 concurrent jobs, 2000 Linux vCPU minutes monthly, and 250k test executions per month at no cost.
Sourceetcd: Can I use etcd as an application database?
No. It is designed for metadata and coordination, with a recommended maximum store size of around 8 GB, no sharding and a write path deliberately optimised for durability rather than throughput. Application data belongs in a database built for it.
Buildkite: What happens if I exceed my included compute minutes on Buildkite?
Hosted agent compute is charged separately at $0.004 per Linux vCPU minute and $0.02 per Mac vCPU minute, billed to the second with no minimums.
Sourceetcd: How many members should a cluster have?
Three for most cases, five where you need to survive two simultaneous failures. Always an odd number, because an even-sized cluster gains no additional fault tolerance while making quorum harder to reach.
Buildkite: Do I need an annual commitment for Buildkite's Pro plan?
No, Buildkite's Pro plan is billed monthly at $30 per active user with no long-term contract required. All tiers include a 30-day all-access trial.
Sourceetcd: What happens when the store fills up?
The cluster raises a NOSPACE alarm and stops accepting writes, becoming effectively read-only. Recovery requires compacting old revisions, defragmenting each member and then explicitly disarming the alarm, all done by an operator.
Buildkite: What user limits apply to each Buildkite plan?
Free plan supports up to 5 users, Pro plan supports up to 50 users, and Enterprise plan provides unlimited users with a 30-user minimum.
Sourceetcd: Why is my etcd cluster slow or unstable?
Almost always disk latency. Because every write is fsynced before acknowledgement, slow or shared storage causes heartbeat timeouts, leader elections and cascading latency. Local SSDs with low fsync latency are effectively a requirement.
etcd: How does it compare with Consul or ZooKeeper?
All three provide consensus-backed coordination. etcd has the simplest data model and the Kubernetes ecosystem behind it; Consul bundles service discovery, health checking and a service mesh; ZooKeeper is older, JVM-based and still common under Kafka and Hadoop-era systems.
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