CloudKnife vs Tessary
CloudKnife and Tessary are both uptime & monitoring tools aimed at developers and small businesses. Both have a free plan.
Azure FinOps tool that finds waste and applies approved fixes
Open-source monitoring that finds why production AI agents fail
| Pricing | Freemium | Open source |
| Starting price | Not published | Not published |
| Free plan | Yes | Yes |
| Free trial | 14 days | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web | web, linux |
| Country | BE | — |
| Rating | — | — |
Choose CloudKnife if
Azure-centric companies, especially in Europe, that want cost recommendations with evidence and help executing them.
- Every recommendation shows its reasoning and data
- Changes start as proposals you approve, automation is opt-in
- Free plan for Azure spend up to €5k a month
Look elsewhere if: Teams running mostly on AWS or Google Cloud, or wanting cost data inside an existing observability stack (Datadog).
Choose Tessary if
Engineering teams running AI agents in production with OpenTelemetry traces who want every trace checked and failures explained.
- Apache 2.0 open source with free self-hosting
- Checks every trace instead of a sampled subset
- RCA links failures to specific commits when a repo is connected
Look elsewhere if: Teams that want a mature, fully supported observability suite or an eval-first workflow (Datadog, Braintrust).
CloudKnife vs Tessary pricing
CloudKnife
- Free€0Up to €5k cloud spend, 3 Azure subscriptions, 2 users
- Standard€100/mo1% of spend (shown at €10k), up to €50k; 10 subs, 10 users
- Full€400/mo4% of spend (shown at €10k), up to €50k, all recs, 100 subs/users
- EnterpriseCustomTailored contract, billing and limits; onboarding with the team
Tessary
- Open Source$0Self-host with Docker Compose; all core features
- Cloud Free$010k traces/mo, 1 GB, 30-day retention, $10 one-time RCA credit
- PaidCustomCustom classifiers, managed dedicated instance, Slack support
CloudKnife · Key features
- Workload-aware rightsizing across VM families, not just smaller sizes
- Scheduling that shuts down resources on nights and weekends
- Detection of orphaned disks, old snapshots and unused commitments
- Commitment simulation for reservations and savings plans before buying
- Cost allocation by application, team or customer
- Spend alerts delivered with their root cause
Cons
- Supports only Azure today; AWS and Google Cloud are not yet available
- Price grows with your cloud spend (1% or 4%)
- Standard plan gives only an optimisation preview
Tessary · Key features
- Classifiers run on every production trace with no sampling
- Built-in checks for drift, tool errors, secret leaks and malformed output
- LLM triage groups real deviations into trackable cases
- Root-cause analysis over failing traces and your GitHub repository
- OTLP ingestion over HTTP and gRPC with OpenTelemetry gen_ai conventions
- PII redaction before traces are stored
Cons
- Very new project with a short track record
- Paid plan prices are not published
- Frustration classifier requires your own OpenRouter or TypeSafe key
CloudKnife vs Tessary: FAQ
Do CloudKnife and Tessary have a free plan?
Yes, both CloudKnife and Tessary have a free plan; paid plans add more usage and features.