Alternatives
10 best Prometheus alternatives
Tools that cover the same task as Prometheus (observability), ranked by how completely their pricing, free tier and API access are documented. Checked Oct 4, 2026.
- Prometheus starts at
- Not listed
- Free plan
- Free plan
- API
- API available
- 01
Axiom
Axiom is a cloud machine-data platform for high-volume logs, events, and telemetry with schema-less ingest and APL querying. Teams use it for observability and analytics at petabyte scale without operating their own event store infrastructure.
Best for: Developers and platform teams ingesting large event volumes who want managed storage, APL analytics, and usage-based cloud scaling.
- 02
CatchJS.com
CatchJS monitors client-side JavaScript errors and real-user performance metrics such as Core Web Vitals, capturing stack traces, optional screenshots, click trails, and source maps so teams learn about breakages before users report them.
Best for: Web teams shipping JavaScript-heavy apps who need error and RUM telemetry from production browsers.
- 03
Honeybadger
Plans scale usage thresholds and collaboration features for solo developers through business teams.
Best for: Solo developers and engineering teams who want unified error, log, uptime, and cron monitoring without assembling multiple tools.
- 04
Aiven
Aiven is a managed open-source data platform spanning PostgreSQL, Kafka, OpenSearch, ClickHouse, Grafana, and related services. It targets teams that want cloud-hosted databases and streaming infrastructure with transparent plan-based pricing across major hyperscalers.
Best for: Platform engineers who need managed OSS data services without operating their own Kubernetes database operators.
- 05
Langfuse
Langfuse is an open-source LLM engineering platform for tracing, evaluating, and improving AI agents with collaborative debugging and metrics. Langfuse Cloud offers hosted Hobby, Core, and Pro tiers metered in observability units.
Best for: AI engineers who need open-source-friendly observability and eval workflows without building tooling in-house.
- 06
Authgear
Authgear is an open-source customer and workforce identity platform from Skymakers. It delivers passkeys, passwordless OTP, SAML SSO, adaptive MFA, RBAC, and user management on Authgear Cloud, customer VPC, or self-hosted deployments with data sovereignty options.
Best for: Teams replacing legacy CIAM vendors who need every login method on every tier and portable user exports.
- 07
Bytebase
Bytebase is a database governance platform for teams and AI agents to change, access, and audit databases across environments. It unifies schema migrations, access control with masking and just-in-time access, compliance workflows, and integrations with identity and GitOps tools.
Best for: Platform and data teams that need reviewable database change workflows, access policies, and audit trails.
- 08
Medplum
Medplum is an open-source healthcare developer platform for building and running modern clinical apps on FHIR-native infrastructure. It offers hosted cloud tiers and self-hosted options with bots, integrations, authentication, and compliance features aimed at digital health teams shipping production patient-facing software.
Best for: Healthcare engineering teams building FHIR-based apps who need an open-core platform with hosted or self-managed deployment paths.
- 09
Laminar
Laminar is an open-source agent observability platform that captures LLM calls, tool calls, sub-agents, costs, and tokens, then surfaces failures through Signals and clustered failure modes. Hosted plans add retention, data limits, and support tiers for teams shipping production agents.
Best for: Engineering teams running AI agents who need trace visibility, automatic failure detection, and hosted retention without building observability in-house.
- 10
Tiptap Editor 3.0 Beta
Tiptap is a headless rich-text editor framework with 100+ extensions and a paid Tiptap Platform for collaboration, comments, DOCX conversion, AI toolkit agents, and cloud documents. Developers embed the open-source editor or buy hosted platform tiers for production document apps.
Best for: Product teams building Notion-like, legal, or AI-native editors who need extensible React components plus optional hosted collaboration.
Prometheus alternatives: common questions
What is the best free alternative to Prometheus?
Axiom has an ongoing free plan. Personal plan is $0 per month permanently with always-free allowances for ingest, query compute, storage, and retention limits shown on pricing. Free plans change, so check the vendor before relying on one.
What is the cheapest Prometheus alternative?
Aiven has the lowest listed starting price at $5/mo.
Which Prometheus alternatives have an API?
Axiom, Honeybadger, Aiven, Langfuse, Authgear mention API or developer access.