Foglamp vs Pi Web: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Foglamp and Pi Web — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Foglamp

Freemium

Observability for AI agents: see the cost, latency, traces, and output quality of every LLM call with one SDK.

Two-Line SDK Instrumentation: Wrap your model once and every generateText / streamText call is automatically instrumented.
Per-Agent Spans and Spend: View per-agent spans, latency, and spend with the full call flow across orchestrator, researcher, writer, and critic.
Evals: Score production traffic with code checks and LLM judges, including PII checks and pass-rate scoring.
Distributed Traces: Waterfall every run with the exact prompt and response captured per span.
Alerts: Set threshold rules on cost, latency, and error rate to catch problems early.
Cost Intelligence: Know exactly what every call costs broken down by model, agent, and customer.

Catching Cost Regressions: Detect a sudden 10x cost spike days after shipping before it drains the budget.
Debugging Bad Output: Trace the exact prompt and response that produced a wrong or hallucinated answer.
Quality Gating with Evals: Continuously score production traffic to verify agents stay accurate and PII-safe.
Latency Monitoring: Alert when per-agent latency crosses a threshold so slow responses are caught fast.
Per-Customer Spend Analysis: Break down LLM spend by customer and model to understand unit economics.

agegr

Free

Local web UI for the Pi coding agent — browse sessions, switch worktrees, manage models, and chat beside your project files in a browser.

Session Browser: Reads local Pi session files and organizes prior conversations by project for quick resume.
Fork and Continue: Continue from any earlier message or fork a session into a separate route to try alternatives safely.
Git Worktree Switcher: Switch between Git worktrees from the sidebar to work on multiple branches in parallel.
File Preview: Side-by-side chat and project file browser that previews source, docs, images, audio, and PDFs.
Model and Skill Manager: Configure models, API keys, run model tests, and toggle skills from the web UI instead of CLI flags.
Local-Only Runtime: Runs on http://127.0.0.1 by default so session data and code never leave the developer's machine.

Resume Prior Work: Reopen a conversation from last week by project instead of scrolling terminal history.
Safe Experimentation: Fork a session to try a risky refactor without losing the original conversation state.
Parallel Branch Work: Switch Git worktrees mid-session to jump between feature branches in one workspace.
Model Comparison: Rerun the same task against different configured models to compare output quality.
In-Browser Code Review: Preview generated diffs and project files beside the chat without leaving the browser.