
Last9
Unified observability for developers, SREs, and AI agents to triage faster and ship code with confidence.
Updated: February 2026
Professional tools for marketing, design, and creative agencies. Manage clients, projects, and deliverables at scale. We've curated 15 tools specifically suited for agencies.

Unified observability for developers, SREs, and AI agents to triage faster and ship code with confidence.

All-in-one error tracking, application performance monitoring, and uptime checks for web apps.

The universal, open-source observability solution for IT & OT infrastructure.

Collect, organize, and alert on software errors and performance in real-time, affordably.

Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
Test, monitor, and visualize geospatial APIs to accelerate development and ensure reliability.

Industrial IoT platform for predictive maintenance, efficiency, and digital transformation.

Continuously optimize Kubernetes CPU and GPU allocation to reduce cloud spend and improve performance.
Autonomous monitoring and troubleshooting with self-learning AI across your entire stack.

End-to-end customer journey intelligence and product analytics, powered by AI.

The fastest, most durable way to collect event data from every source into your data warehouse.
Based on our analysis, Last9 is the top choice for agencies, with a score of /100.
Yes! Last9, Honeybadger, Btop offer free plans suitable for agencies.