SecondStack - 2026 Pricing, Features, Reviews & Alternatives

SecondStack is a self-hosted AI platform for organizations that want modern AI tooling without sending data to third-party SaaS.

For employees it ships three workspaces. SecondChat is a multi-model chat app with image generation, voice input, file attachments and retrieval-augmented generation over Knowledge Collections: named, shareable document sets that are auto-indexed for search. SecondAgent runs agentic workloads in per-thread sandboxed Docker containers for file handling, browser automation and document creation. Code tooling connects engineering teams to the same governed models.

For platform and security teams, SecondGate is the enterprise LLM API gateway: every AI request in the organization goes through a single OpenAI-compatible endpoint with virtual API keys, model access control, per-user, per-team and per-key budgets with threshold alerts, and request-level usage analytics. Supported providers include Anthropic Claude, OpenAI, Azure, Google (AI Studio and Vertex), Amazon Bedrock, Databricks and xAI. SecondGuard, the guardrails module, detects and blocks sensitive content with heuristic and AI-based classification, and the ControlTower dashboard centralizes model management, provider configuration and deployments.

Security and deployment: SecondStack runs inside your own infrastructure via Docker Compose or Kubernetes, with a managed hosting option available. Authentication is OAuth with federation to Entra ID (Azure AD), Okta or Keycloak; group membership drives team assignment and model access. Conversations and logs stay in your environment. Pricing is not per-seat, and implementation is backed by an ISO 27001-certified partner.