AI ERP with agents inside the systems you run
AI phone and voice agents for real calls
LLM.coPrivate, self-hosted LLM deployments
Legal AI infrastructure for firms
AI RFP discovery and response drafting
Automatic.coBusiness process automation
CyberAttack.aiThreat detection and defense
Secure AI virtual data roomsExceptionless
Exceptionless is an open-source error tracking and reporting platform built on C# that aggregates exceptions and errors from JavaScript, Node.js, and .NET applications in real time. It provides a web dashboard to organize, prioritize, and resolve bugs, with support for self-hosting via Docker or cloud deployment.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | exceptionless/Exceptionless |
| Owner | exceptionless |
| Primary language | C# |
| License | Apache-2.0 — OSI-approved |
| Stars | 2.5k |
| Forks | 507 |
| Open issues | 50 |
| Latest release | v8.6.2 (2026-07-06) |
| Last updated | 2026-07-08 |
| Source | https://github.com/exceptionless/Exceptionless |
What Exceptionless is
A .NET Core/ASP.NET backend with legacy Angular UI (main) and emerging Svelte 5 frontend, using Elasticsearch and Redis for indexing and caching. Exposes HTTP APIs for client SDKs across web and desktop platforms, with infrastructure managed via .NET Aspire for local development.
Get the Exceptionless source
Clone the repository and explore it locally.
git clone https://github.com/exceptionless/Exceptionless.gitcd Exceptionless# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Requires .NET 10.0+ and Node 24+ for local development; self-hosting needs Docker, Elasticsearch, and Redis—plan 1–2 weeks for production hardening.
- Frontend split between legacy Angular (production) and Svelte 5 (WIP)—expect UI inconsistencies and potential breaking changes during Svelte migration.
- Client SDKs across platforms must be added to each app; no automatic instrumentation, so adoption scope depends on codebase count.
- Data retention, indexing, and ES/Redis storage sizing are critical; misconfiguration will degrade query performance and cost.
- First account created is automatically admin—ensure secure first-user onboarding in production to prevent privilege escalation.
When to avoid it — and what to weigh
- Strict on-prem security mandates without DevOps capacity — Self-hosting requires Docker, .NET, Node, and ongoing maintenance of Elasticsearch/Redis infrastructure. Without dedicated DevOps, this becomes a support burden.
- Heavy real-time streaming or ML-driven anomaly detection — No evidence of advanced ML, predictive alerting, or sub-second latency SLAs. Suitable for batch organization, not near-real-time anomaly flagging.
- Highly regulated industries requiring FedRAMP or HIPAA — No attestation in provided data. Organizations needing compliance certifications should require formal security review and vendor assessment.
- Monolithic legacy apps with zero containerization — While the project supports many platforms, deployment assumes Docker and modern .NET runtime; legacy Win32/COM apps may require custom SDK integration.
License & commercial use
Apache License 2.0 (Apache-2.0) — a permissive open-source license allowing commercial use, modification, and distribution with liability disclaimers and attribution requirements.
Apache-2.0 permits commercial deployment and modification. However, the project also advertises a commercial hosted SaaS offering and paid support. Verify your intended use (self-hosted vs. resale of Exceptionless as a service) does not conflict with commercial offerings or contributor expectations, and review the CONTRIBUTING.md for any additional terms.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Moderate |
| DEV.co fit | Good |
| Assessment confidence | High |
Apache-2.0 license includes no warranty. No security audit, CVE history, or hardening guide evident in data. Self-hosting requires securing Elasticsearch (no auth by default), Redis, and .NET app endpoints. First admin user auto-creation and default credentials (dev mode) pose onboarding risk. Recommend security assessment before production, especially in regulated environments.
Alternatives to consider
Sentry
Mature SaaS-first error tracking with stronger ML anomaly detection, better mobile SDK coverage, and HIPAA/SOC2 compliance options. Higher cost for small teams.
Rollbar
SaaS with strong .NET and JavaScript support, better Slack/PagerDuty integrations, and simpler self-hosting model. Less configurable than Exceptionless for DevOps power users.
DataDog APM / Elastic Observability
Enterprise observability stacks with deeper infrastructure integration, tracing, and metrics. Requires larger budgets but eliminates single-tool lock-in risk.
Build on Exceptionless with DEV.co software developers
Exceptionless offers cost-effective self-hosting and SaaS options. Let our DevOps team help you evaluate deployment complexity, infrastructure costs, and integration with your existing stack.
Talk to DEV.coRelated open-source tools
Surfaced by semantic similarity across the DEV.co open-source index.
Related on DEV.co
Explore the category and the services that help you build with it.
Exceptionless FAQ
Can we self-host Exceptionless without paying the SaaS fee?
Is our data private if we self-host?
What SDKs are available?
How long does production setup take?
Software development & web development with DEV.co
Pairing Exceptionless with the rest of your stack is where most open-source observability projects stall. DEV.co is a software development agency that does the integration work — plus AI development when models are in scope.
Ready to Deploy Error Tracking?
Exceptionless offers cost-effective self-hosting and SaaS options. Let our DevOps team help you evaluate deployment complexity, infrastructure costs, and integration with your existing stack.