Infisical Raises $40 Million to Expand Security Platform
The San Francisco-based security firm reached a $600 million valuation following the Series B funding round.
Updated on Oct. 27, 2026 in Startups
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San Francisco security startup Infisical has closed a $40 million Series B funding round. The investment pushes the company's valuation to $600 million as it expands its infrastructure platform for developers and AI agents.
Why it matters
The funding underscores the growing demand for security tools designed to manage secrets and encryption keys as companies integrate more AI agents into their workflows. This capital injection marks a significant milestone for the local firm as it scales its operations to serve its global user base.
Infisical secured $40 million in Series B funding, reaching a $600 million valuation. The platform currently serves more than 1,300 customers and 300,000 developers worldwide, with future expansion plans still unknown.
The players
Infisical
A San Francisco-based company providing security infrastructure to manage secrets and encryption keys for developers and AI agents.
Elad Gil
A prominent tech investor who led the company's Series B funding round.
Gradient
A venture capital firm that participated in the investment round.
Y Combinator
A startup accelerator and investment firm that took part in the funding round.
The details
Led by investor Elad Gil, the round included participation from Gradient and Y Combinator. Infisical provides an infrastructure platform that manages secrets, certificates, and encryption keys, including an Agent Vault feature that allows AI agents to interface with sensitive systems without exposing credentials. The firm, headquartered in San Francisco, will use the new capital to further develop its security tools for machines and human developers.
Timeline
October 27, 2026: Infisical announced the completion of the Series B funding round.
Across the Bay
Infisical follows the growth trajectory of many local tech firms that have utilized the Y Combinator accelerator to scale their operations. The company's latest funding round marks another instance of a local startup leveraging this network to reach a significant market valuation.
Local developers who use the Infisical platform may see new updates to the Agent Vault and encryption management tools. The company continues to maintain its headquarters in San Francisco as it scales its workforce following the funding.
The takeaway
The company’s growth highlights the increasing importance of securing machine-to-machine communication as AI adoption rises. Keep an eye on the firm's platform updates to see how they refine their Agent Vault technology for enterprise use.
Further reading
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