Fiddler AI vs Galileo

Fiddler AI is an observability, evaluation and guardrails platform that now calls itself "the control plane for enterprise AI agents." It was founded in October 2018 by Krishna Gade (CEO), formerly an engineering manager at Facebook, and Amit Paka (COO), and is based in Palo Alto, California. It has raised $100 million; its latest round was a $30 million Series C led by RPS Ventures in January 2026, with Lightspeed Venture Partners, Lux Capital and Insight Partners among the existing investors taking part. Fiddler says its revenue grew more than fourfold in the 18 months before that round. Customers shown on its site include Nielsen, Integral Ad Science, Qualtrics, Thumbtack, LendingPoint, American Family Insurance and the US Department of Energy. The platform covers two kinds of AI. For predictive models, ML Observability tracks performance, drift and data integrity with root-cause analysis, gives global and local explanations, and runs fairness checks such as disparate impact, equal opportunity and demographic parity on structured, text and image models. For LLM applications and agents, it ingests OpenTelemetry traces (with integrations for LangGraph, LangChain, Strands Agents, Google ADK, Claude Code and LiteLLM), scores them with 80+ built-in metrics, custom evaluators or your own LLM judge, and runs experiments against golden datasets. Its Guardrails, powered by Fiddler's own Centor models, screen prompts and responses for hallucinations (faithfulness), toxicity, jailbreaks, prompt injection and 35+ types of PII and PHI. Fiddler says enforcement takes under 80 ms and runs inside the customer's cloud or VPC with no data leaving it. Deployment options are SaaS, VPC, AWS GovCloud and on-premises. **AI compliance coverage** Fiddler's governance features are audit trails that record every decision, action, evaluation and policy outcome, plus executive dashboards. Its governance page names SR 11-7, HIPAA and NAIC, and lists the EU AI Act among relevant policies; its Control Plane FAQ says its audit trails support the NIST AI RMF, ISO/IEC 42001, HIPAA, SR 11-7, NAIC and the EU AI Act. It doesn't publish control mappings, templates or a model inventory for any of them. Fiddler says it has a SOC 2 Type II report and is HIPAA compliant. In 2023 it released Fiddler Auditor, a free LLM red-teaming and robustness library under the Elastic License 2.0, but its last release was in November 2023 and red-teaming isn't part of the current platform. **Who it's for** Enterprises in financial services, insurance, healthcare and government that run predictive models and LLM agents in production and want monitoring, evaluation and runtime guardrails in one place, often inside their own cloud. It is an observability and enforcement layer, not a governance workflow tool: teams that need AI inventories, risk assessments and policy workflows will need a governance platform alongside it.

Galileo is an evaluation, observability and guardrails platform for generative AI applications and AI agents. It has been owned by Cisco since May 2026: Cisco announced its intent to acquire Galileo Technologies, Inc. on April 9, 2026, and said on May 22, 2026 that the acquisition was complete. Terms weren't disclosed. Galileo is now part of Splunk, a Cisco company, and its documentation says that as of August 7, 2026 "Galileo is now Splunk Agent Observability." Customers who onboarded before that date use Galileo's documentation; later customers use Splunk's. galileo.ai's pricing page now redirects to Splunk's pricing page. Galileo was founded in 2021 by Vikram Chatterji (CEO), formerly of Google AI, Atindriyo Sanyal, formerly of Apple and Uber AI, and Yash Sheth, formerly of Google, and was based in San Francisco. Before the acquisition it raised $68 million, most recently a $45 million Series B led by Scale Venture Partners in October 2024; it then said six Fortune 50 companies, including Comcast and Twilio, were customers. The platform logs traces and spans from agent frameworks (LangChain and LangGraph, CrewAI, the OpenAI Agents SDK, Strands Agents, the Vercel AI SDK, and any OpenTelemetry or OpenInference source) and scores them with metrics such as context adherence, correctness, tool selection quality, action completion, toxicity, PII, prompt injection and sexism/bias. Many metrics run on Luna-2, Galileo's small evaluation models, which require an enterprise plan; Galileo says they cut production monitoring costs by up to 97% with latency under 200 ms. Signals (January 2026) detects failure patterns across production traces and can turn them into custom metrics. Agent Control, an open-source (Apache 2.0) control plane released in March 2026, applies central policies to agents (deny, steer, warn, log or allow) using Luna, NVIDIA NeMo, Amazon Bedrock or custom evaluators. It replaced Galileo's older Protect guardrails, which were deprecated in June 2026. Under Splunk, Galileo's technology is being added to the AI Agent Monitoring feature of Splunk Observability. In June 2026 Splunk described Splunk Agent Observability as a new on-premises offering powered by Galileo; in October 2026 it said the product had started rolling out in September 2026 on premises, in Cisco Cloud Control and in Splunk Observability Cloud, and its pricing page lists it for Observability Cloud and self-hosted deployments. **AI compliance coverage** Galileo doesn't document support for the EU AI Act, the NIST AI RMF or ISO 42001. Its trust page says it has a SOC 2 Type II report, provides HIPAA-compliant infrastructure and can sign business associate agreements (BAAs). What it offers a compliance program is evidence of how models and agents behave (evaluation scores, traces and guardrail decisions), not framework controls or an AI inventory. **Who it's for** Engineering teams building LLM applications and agents that want evaluation, production monitoring and runtime guardrails in one tool. New customers now buy through Splunk, so it fits Splunk Observability customers most naturally.