Rabbit vs Sierra AI

Sierra AI has a disclosed valuation of $10B, while Rabbit's valuation is not publicly available, making a direct size comparison difficult. Sierra AI employs 150 people.

Sierra AI has raised more in total funding at $635M, compared to Rabbit's $64.7M — a gap of $570.3M. Combined, the two companies have completed 4 known funding rounds.

Sierra AI leads with an Awaira Score of 92/100, while Rabbit sits at 32/100. That 60-point gap reflects real differences in funding, scale, and traction — it's not a vanity metric.

Rabbit was founded by Jesse Lyu in 2021. Sierra AI was founded by Bret Taylor in 2023. Visit each company's profile on Awaira for a full founder biography.

Rabbit: Rabbit is an AI agents company founded in 2021 that develops autonomous AI systems designed to interact with software applications and digital interfaces on behalf of users. The company's flagship product is an AI agent capable of understanding natural language commands and executing complex tasks across various applications without requiring specialized integrations or APIs. Rabbit's technology focuses on vision-based interaction, enabling AI agents to interpret and navigate user interfaces similarly to human operators. The company operates in the AI agents category, a growing segment focused on automation and task completion through artificial intelligence. Rabbit has raised $65 million in Series A funding as of its last disclosed round, though its current valuation remains undisclosed. The company positions itself within the broader AI automation landscape alongside other agent-focused startups, competing in a market increasingly focused on reducing manual digital work. Rabbit's approach emphasizes practical applications across enterprise and consumer use cases. The technology targets workflow automation, data processing, and cross-application task management. The company's growth trajectory reflects investor confidence in AI agent technology, though specific customer counts and revenue figures are not publicly disclosed. Rabbit operates in a competitive space with other AI automation platforms exploring similar autonomous agent capabilities and natural language interaction models. Rabbit develops vision-based AI agents that execute tasks across applications without API integrations, focusing on practical automation through natural language understanding. Sierra AI: Sierra AI builds conversational AI agents designed to serve as the primary customer experience layer for consumer brands, replacing traditional chatbots and interactive voice response systems with autonomous agents capable of handling complex, multi-turn interactions. Co-founded in 2023 by Bret Taylor, former co-CEO of Salesforce and chairman of the board at OpenAI, alongside Clay Bavor, a former Google executive who led AR/VR initiatives, the company brings unusual executive credibility to the enterprise AI agent space. The company has raised approximately $635 million in total funding, achieving a $10 billion valuation at its Series C round. Investors include Sequoia Capital, Benchmark, and Greenoaks Capital. Sierra's agents integrate directly into existing enterprise tech stacks, handling tasks from order management and subscription changes to returns processing and account troubleshooting — all without requiring human escalation for the majority of interactions. Clients reportedly include WeightWatchers, Sonos, and other major consumer brands. Sierra AI operates in a rapidly consolidating AI customer service market, competing against Intercom's Fin, Ada, and legacy players like Zendesk and Salesforce Service Cloud. The company's advantage stems from its founding team's deep enterprise relationships and product instincts refined across decades at Google and Salesforce. With customer service representing an estimated $350 billion annual spend globally, Sierra's bet is that AI agents will absorb a significant share of that budget within five years, fundamentally restructuring how brands interact with their customers at scale.

Rabbit got there first, launching in 2021 — that's 2 years of extra runway. Sierra AI didn't arrive until 2023. In AI, that kind of head start means more training data, deeper customer relationships, and a bigger talent moat.

Rabbit has about 30 employees; Sierra AI has about 150. A bigger team usually means more revenue or heavier VC backing, but in AI, small teams can build at massive scale.

Yes — they're direct rivals. Both Rabbit and Sierra AI compete in AI Agents, targeting many of the same buyers. If you're evaluating one, you should be looking at the other.