Portkey alternatives
The 8 closest alternatives to Portkey, which has a free tier. Each one below does roughly the same job from a different angle.
Why people move off Portkey
- Free tier of 10,000 requests is limited for active production use
- Guardrails and advanced routing features require paid plans
- Adds proxy latency similar to other gateway-based tools
Worth weighing against what it does well: unified API for 200+ LLM providers reduces vendor lock-in
The 8 best Portkey alternatives
-
LLM observability and cost monitoring for production AI applications
Has a free tier, where Portkey has a free tier. Overlaps with Portkey on developer-tools and api.
Best for: Production LLM apps that need cost visibility and per-user tracking; Teams debugging latency spikes and unexpected model failures
-
LLM observability, testing, and evaluation platform from the LangChain team
Has a free tier, where Portkey has a free tier. Overlaps with Portkey on developer-tools and api.
Best for: Teams building LangChain or LangGraph applications needing native observability; Product teams running systematic quality evaluations of LLM outputs
-
Open-source LLM observability with full self-hosting and production-ready tracing
Has a free tier, where Portkey has a free tier. Overlaps with Portkey on developer-tools and api.
Best for: Teams with GDPR or data residency requirements needing a self-hosted solution; Open-source-first organizations that want auditable infrastructure
-
Speech-to-text API and audio intelligence platform with LLM-powered analysis via LeMUR
Has a free tier, where Portkey has a free tier.
Best for: Meeting and call recording with automatic summarization and action item extraction via LeMUR; Call center quality analysis and compliance monitoring at scale
-
Speech-to-text API and voice agent platform built for real-time low-latency applications
Has a free tier, where Portkey has a free tier.
Best for: Real-time transcription for customer service calls, sales calls, and meeting recording; Voice agent pipelines where end-to-end latency under one second is required
-
Low-latency voice agent platform with emotion-adaptive dialogue for sales and support
Starts at $0.07/mo, where Portkey has a free tier.
Best for: Outbound sales calls with adaptive tone adjustment based on prospect reaction; Inbound customer support for e-commerce and SaaS with CRM integration
-
Developer-focused voice AI platform for building production-grade voice agents via API
Has a free tier, where Portkey has a free tier.
Best for: Customer support bots handling inbound calls with full CRM integration via function calling; Outbound appointment reminder and confirmation calls with natural conversation flow
-
AI music generation API and royalty-free streaming for apps, games, and content platforms
Has a free tier, with paid plans from $14/mo, where Portkey has a free tier.
Best for: Game developers integrating adaptive background music through the API that adjusts to gameplay state; App developers adding ambient music to meditation, focus, or productivity applications
Side by side
| Tool | Pricing | Free tier | Platforms |
|---|---|---|---|
| Portkey | Free tier | Yes | Web, API, Self-hosted |
| Helicone | Free tier | Yes | Web, API |
| LangSmith | Free tier | Yes | Web, API |
| Langfuse | Free tier | Yes | Web, API, Self-hosted |
| AssemblyAI | Free tier | Yes | API, Python SDK, JavaScript SDK, Java SDK, Ruby SDK, Go SDK, C# SDK |
| Deepgram | Free tier | Yes | API, Python SDK, JavaScript SDK, Go SDK, .NET SDK |
| Retell AI | From $0.07/mo | No | API, Web, Phone |
| Vapi | Free tier | Yes | API, Web, Phone |
| Mubert | Free tier, then $14/mo | Yes | Web, API |