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

A side-by-side comparison of Foglamp and Prism — 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.

Freemium

A native macOS AI workspace with multi-provider chat, hosted models, an MCP registry, and @-tools.

Multi-Provider Chat: Use GPT-5.5, Claude Opus, Gemini, and local models and compare providers side by side in one workspace.
Prism Hosted: Access frontier models for reasoning, coding, and long-context work without bringing your own API key.
Quick AI: Summon any model from any macOS app without breaking your flow.
MCP Registry and @-Tools: Curated MCP servers with saved credentials and @-mention tools for file, quiz, and flash-card flows inside the thread.
Local Proxy: An OpenAI-compatible local proxy on paid plans routes external IDEs and CLIs like Claude Code through your configured models.
Native macOS Design: A single SwiftUI window for chat, tools, and history built specifically for Mac.

Comparing Models Side by Side: Test the same prompt across multiple providers and pick the best answer.
Key-Free Frontier Access: Use top hosted models through Prism Hosted without managing your own API keys.
In-App AI Anywhere: Trigger Quick AI from any Mac app to draft or answer without switching context.