Series E - raising $950 million from new and existing investors, led by @Tiger_Global and @GVteam, at a valuation of over $15 billion. Sierra now has more than $1 billion to invest in becoming the global standard for companies transforming their customer experiences with AI.
Sierra launches Level 1 PCI-compliant payments for AI agents
Introducing the first Level 1 PCI-compliant payment capability for AI agents. No more “please hold” or clunky IVRs when it’s time to pay. With Sierra, customers complete secure payments right inside a chat or voice conversation. Read more here: https://t.co/gI0IF55UHH
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Launched Apr 7, 2026View post
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