$ modelux vs helicone
Modelux vs Helicone
Helicone is great at observability for LLM apps — logs, analytics, sessions. Modelux is the broader control plane: same observability story, plus routing, policy enforcement, budgets with auto-downgrade, replay against historical traffic, and a custom rule DSL. Pick Modelux when you also need to act on what you observe.
pick modelux when
- ▸ You want one tool for routing AND observability AND governance
- ▸ You want fallbacks, ensembles, cost-optimized routing
- ▸ Per-tenant budgets with auto-downgrade matter
- ▸ You want to replay traffic against new configs
- ▸ You're managing policy across multiple teams
pick helicone when
- ▸ You want pure observability and don't need routing logic
- ▸ You're heavily using their prompt management or session features
- ▸ Their developer experience already fits your team
# compare
Capability comparison
| Capability | Modelux | Helicone |
|---|---|---|
| Positioning | ||
| Self-described as | LLM control plane | Observability for LLM apps |
| Primary value | Routing + governance + observability | Logs + analytics |
| Routing | ||
| Provider abstraction | ✓ (built-in) | Header-based, simpler |
| Fallback chains | ✓ | — |
| Cost-optimized routing | ✓ | — |
| Ensembles + cascades | ✓ | — |
| A/B tests | ✓ | Limited |
| Custom rule DSL | ✓ | — |
| Observability | ||
| Searchable request logs | ✓ | ✓ |
| Per-request cost | ✓ | ✓ |
| Latency percentiles | ✓ | ✓ |
| User-level analytics | ✓ | ✓ |
| Decision trace | ✓ (per request) | — |
| Control plane | ||
| Versioned configs | ✓ | — |
| Replay simulator | ✓ | — |
| Budgets + auto-downgrade | ✓ | Caps |
| Audit log | ✓ | Limited |
| Integration | ||
| OpenAI SDK drop-in | ✓ (base_url swap) | ✓ (base_url swap) |
| Sessions / threads | Tags-based | ✓ (built-in) |
| Prompt management | — | ✓ |
| AI-native | ||
| MCP server | ✓ | — |
Positioning
Self-described as
Modelux
LLM control plane
Helicone
Observability for LLM apps
Primary value
Modelux
Routing + governance + observability
Helicone
Logs + analytics
Routing
Provider abstraction
Modelux
✓ (built-in)
Helicone
Header-based, simpler
Fallback chains
Modelux
✓
Helicone
—
Cost-optimized routing
Modelux
✓
Helicone
—
Ensembles + cascades
Modelux
✓
Helicone
—
A/B tests
Modelux
✓
Helicone
Limited
Custom rule DSL
Modelux
✓
Helicone
—
Observability
Searchable request logs
Modelux
✓
Helicone
✓
Per-request cost
Modelux
✓
Helicone
✓
Latency percentiles
Modelux
✓
Helicone
✓
User-level analytics
Modelux
✓
Helicone
✓
Decision trace
Modelux
✓ (per request)
Helicone
—
Control plane
Versioned configs
Modelux
✓
Helicone
—
Replay simulator
Modelux
✓
Helicone
—
Budgets + auto-downgrade
Modelux
✓
Helicone
Caps
Audit log
Modelux
✓
Helicone
Limited
Integration
OpenAI SDK drop-in
Modelux
✓ (base_url swap)
Helicone
✓ (base_url swap)
Sessions / threads
Modelux
Tags-based
Helicone
✓ (built-in)
Prompt management
Modelux
—
Helicone
✓
AI-native
MCP server
Modelux
✓
Helicone
—
Based on Helicone's public documentation as of April 2026. Helicone is fundamentally an observability tool; many "—" cells below are correctly outside their scope, not a knock against the product. Email hello@modelux.ai to flag inaccuracies.
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