Gateway + Observability. Not just logging.
Helicone is an excellent observability tool — but it is not a gateway. You still need to manage provider API keys, handle routing yourself, and stitch together separate tools for guardrails and team management. Nemo Router is a full LLM gateway with observability, guardrails, team management, and budget controls built in. One API key, one bill, 200+ models, and every feature included from day one. First 100,000 customers get 0% platform fee for life — offer ends August 2026.
The core difference: gateway vs. observability layer
Helicone is a proxy that logs requests to your existing LLM providers. Nemo Router is the gateway itself — it routes, observes, protects, and bills, all in one service. Understanding this architectural difference is key to choosing the right tool for your team.
Helicone sits as a logging proxy between your app and individual providers. You still manage every provider key, every bill, and every integration separately. Helicone observes requests but does not route them.
Nemo Router is the gateway itself. One API key, one bill, automatic routing across 200+ models from 15+ providers. Observability, guardrails, team management, and budget controls are all built into the gateway layer.
Request logging, analytics dashboards, cost tracking, and alerting are all built into Nemo Router. Plus you get LLM routing, guardrails, team management, budget controls, and credit-based billing. You do not need a separate observability tool when your gateway already includes it.
Side-by-side comparison
Helicone excels at observability. Nemo Router includes observability plus everything else you need to run LLM workloads in production — routing, safety, team controls, and billing.
| Feature | Nemo Router | Helicone |
|---|---|---|
| LLM Gateway / Routing | Full gateway (200+ models) | Not available |
| Single API Key | One key, all models | Not available (BYOK) |
| Request Logging | Built-in | Built-in |
| Analytics Dashboard | Built-in | Built-in |
| Guardrails | PII, prompt injection, content filtering | Not available |
| Team Management + RBAC | Owner, admin, member, viewer | Basic (paid plans) |
| Budget Controls | Per key / team / org | Basic rate limiting |
| Credit-Based Billing | One bill, all providers | Not available (BYOK) |
| Provider Key Management | Fully managed — zero config | You manage your own keys |
| Logging Callbacks | Langfuse, Datadog, S3, Slack | Custom integrations |
| Alerting | LLM errors, budget, outage alerts | Basic alerts (paid) |
| Cost Tracking | Real-time, per-request, per-team | Per-request logging |
| Platform Fee | 0% for life (first 100K) | Free tier + paid plans |
| SSO / SAML | Included (all plans) | Enterprise only |
| Audit Logs | Included (all plans) | Enterprise only |
| Open Source Foundation | Built on LiteLLM OSS | Open source core |
| API Compatibility | OpenAI-compatible | Proxy wrapper |
| Uptime SLA | 99.9% | Best effort |
Comparison based on publicly available documentation for Helicone (helicone.ai) as of April 2026. Helicone features and pricing may change. Nemo Router is offering 0% platform fee for life to the first 100,000 customers — offer ends August 2026.
Everything you need in one platform
With Helicone, you get observability — and then need to add a gateway, guardrails, team management, and billing separately. With Nemo Router, all four capabilities are built into a single platform. Every feature is included in every plan.
Full LLM Gateway
- 200+ models from 15+ providers
- OpenAI-compatible API (drop-in replacement)
- Automatic routing and load balancing
- Model fallback chains and retries
- Streaming support for all models
- Caching with configurable TTL
Observability Suite
- Request logging with search and filters
- Real-time analytics dashboard
- Callbacks to Langfuse, Datadog, S3, Slack
- Alert rules for errors, budgets, and outages
- Data policy controls (zero / metadata / full / PII-redacted)
- Per-request cost and latency tracking
Safety and Guardrails
- Content filtering (pre-call and post-call)
- PII detection and redaction
- Prompt injection detection
- Configurable per org, team, or key
- Guardrail logs and analytics
- Zero additional cost — included in gateway
Team and Budget Controls
- RBAC: owner, admin, member, viewer
- Per-key and per-team budgets
- RPM and TPM rate limiting
- SSO / SAML (all plans)
- Audit logging (all plans)
- Credit-based billing with ledger
Simpler integration, fewer moving parts
Helicone requires you to manage provider API keys and add custom headers for logging. Nemo Router gives you one API key with observability built in — no extra headers, no extra tools, no extra configuration.
Sign up at nemorouter.ai
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Get your NEMOROUTER_API_KEY
One key for all 200+ models. No provider keys to manage.
Call any model with observability built in
Logs, analytics, guardrails, and alerts — all automatic.
# With Helicone — you still manage provider keys
client = OpenAI(
base_url="https://oai.helicone.ai/v1",
api_key="sk-your-openai-key", # Still need provider key
default_headers={
"Helicone-Auth": "Bearer sk-helicone-..."
}
)
# With Nemo Router — one key, all models, full observability
client = OpenAI(
base_url="https://api.nemorouter.com/v1",
api_key="sk-nemo-...", # One key for everything
)Why teams choose Nemo Router over Helicone
Helicone solves observability. Nemo Router solves the entire LLM operations stack — routing, observability, safety, and team management in a single platform.
Gateway + Observability in One
Helicone is an observability layer — it logs and analyzes requests but does not route them. You still need a separate gateway or direct provider integrations. Nemo Router is a full LLM gateway with observability built in. Request logging, analytics, alerts, and callbacks to Langfuse, Datadog, S3, and Slack are all included. One tool replaces two.
One Key, One Bill, Zero Config
With Helicone, you manage your own API keys for every provider — OpenAI, Anthropic, Google, Mistral — and handle billing with each separately. With Nemo Router, you get a single NEMOROUTER_API_KEY, buy credits, and call any of 200+ models. We manage all provider keys, routing, and billing. Your team never sees a provider API key.
Built-in Guardrails at the Gateway
Nemo Router includes content filtering, PII detection, and prompt injection protection on every request at the proxy level. These guardrails run before requests reach the model — no additional tools or costs required. Helicone does not offer guardrail functionality; you would need a separate safety tool in your stack.
Enterprise Team Management
Create teams, assign granular roles (owner, admin, member, viewer), set per-team and per-key spending budgets, and track usage per team member. All plans include SSO/SAML, audit logging, and RBAC. First 100,000 customers get 0% platform fee for life with every feature included — offer ends August 2026.
Observability that matches Helicone — built into the gateway
Nemo Router does not compromise on observability. Every request flowing through the gateway is automatically logged, tracked, and available for analysis — with the same depth of insight that Helicone provides, plus the operational controls that only a full gateway can offer.
Request Logging
Every request and response is logged with full metadata — model, tokens, cost, latency, status code, and headers. Search and filter logs by any dimension. Paginated log viewer with expandable detail rows for deep inspection.
Analytics Dashboard
Real-time analytics with configurable time ranges and dimensions. Break down spend and usage by model, team, key, or tag. Export data to CSV for custom analysis. Trend tracking shows usage patterns over time.
Alerting
Configure alerts for LLM errors, budget thresholds, outages, and anomalies. Eight alert types cover the most common operational scenarios. Alerts fire to your configured notification channels including Slack and webhook.
Logging Callbacks
Forward logs to external tools — Langfuse for tracing, Datadog for infrastructure monitoring, S3 for archival, Slack for real-time team notifications. Configure multiple callbacks per organization with per-callback filtering.
Data Policy Controls
Control what request content is logged: zero (no body logging), metadata only, full request and response, or PII-redacted. Configure at the organization level to meet your compliance requirements.
Per-Request Cost Tracking
Every request includes real-time cost data via response headers. Cost is tracked per key, per team, and per organization. Budget controls prevent overspend with automatic enforcement at the gateway level.
Frequently asked questions
Common questions about choosing Nemo Router over Helicone for your LLM infrastructure.
Yes, but Nemo Router is much more than an alternative — it is a superset. Helicone is an observability layer that sits between your app and an LLM provider to log requests and provide analytics. Nemo Router is a full LLM gateway that routes requests across 200+ models from 15+ providers, includes built-in guardrails, team management, budget controls, and observability — all through a single API key and a single bill.
Yes. Nemo Router includes a full observability suite: request logging with search and filters, configurable callbacks to Langfuse, Datadog, S3, and Slack, alerting for LLM errors, budget thresholds, and outages, and data policy controls for what content gets logged. You get Helicone-level observability inside a full gateway — no separate tool required.
Yes. That is the core difference. With Helicone, you still need your own API keys for every provider (OpenAI, Anthropic, Google, etc.) and manage billing with each. With Nemo Router, you get one API key (NEMOROUTER_API_KEY), buy credits, and call any model. We manage all provider keys, routing, and billing for you.
Helicone offers a free tier for logging with paid plans for advanced features. Nemo Router is offering 0% platform fee for life to the first 100,000 customers — offer ends August 2026. All features are included in every plan: guardrails, team management, analytics, observability, SSO, and audit logs. You pay only for the credits you use with zero markup.
No. Nemo Router includes built-in observability (request logs, analytics, callbacks to third-party tools, alerts, and data policy controls). If you already use Helicone and want to keep it, Nemo Router supports logging callbacks to external tools. But most teams find that Nemo Router's built-in observability replaces the need for a separate tool entirely.
Ready to consolidate your LLM stack?
Stop stitching together separate tools for routing, observability, and safety. Nemo Router gives you a full LLM gateway with everything built in. Start with a free Tier 1 account — no credit card required. 0% platform fee for life, every feature included from day one. Offer ends August 2026 — one key, one bill, every feature included.