Reassuring clients about Sanity cloud hosting reliability and self-hosting options

I understand your concerns - the Fastly outage was definitely a wake-up call for many organizations relying on cloud infrastructure. Let me address both of your questions directly.

a) Reassuring clients about cloud hosting reliability

The Fastly incident context: While the 2021 Fastly outage affected many services globally, it's worth noting that Sanity's Content Lake (where your actual content is stored) remained operational during that incident. The outage primarily affected CDN delivery, not the underlying data storage. Sanity uses Fastly for their CDN layer, but the Content Lake itself has separate infrastructure.

Sanity's reliability measures:

• Status transparency: Sanity maintains status.sanity.io where you can monitor uptime and incidents in real-time
• Enterprise SLA: The Enterprise Plan includes uptime Service Level Agreements with dedicated support
• Security compliance: Sanity maintains SOC 2 and ISO 27001 certifications, demonstrating enterprise-grade security and reliability standards
• Multiple availability zones: Cloud providers like Sanity use geographic redundancy that most on-premise setups can't match without significant investment

The counter-argument to on-premise: While outages like Fastly's are concerning, on-premise hosting has its own risks - hardware failures, network issues, lack of automatic failover, and the need for 24/7 monitoring. Cloud providers typically have better uptime percentages (99.9%+) than most organizations can achieve with self-hosted infrastructure.

b) Self-hosting options with Sanity

Short answer: No, you cannot self-host the Sanity Content Lake on-premise or on your own infrastructure.

Sanity is a fully managed cloud service, and the Content Lake (where all your content is stored) must be hosted by Sanity. This is core to their architecture and isn't available as a self-hosted option, even for enterprise customers.

What you CAN control:

• Sanity Studio deployment: You can host Sanity Studio anywhere you want - your own servers, Vercel, Netlify, etc. The Studio is just a React application
• Data residency: Enterprise customers can potentially discuss dataset region options (EU vs US) for compliance requirements
• Dedicated infrastructure: For enterprise customers, Sanity has mentioned they can offer hosting on dedicated cloud infrastructure in some discussions, though this still means Sanity-managed cloud, not truly self-hosted

The architectural reality: Sanity's value proposition is built around their managed Content Lake, real-time collaboration, global CDN, and serverless compute (Sanity Functions). Self-hosting would eliminate most of these benefits and isn't part of their offering.

My recommendation

If your client is absolutely committed to on-premise hosting for their content, Sanity may not be the right fit. However, I'd encourage reframing the conversation around:

1. Data residency and compliance - Enterprise plans can address regulatory concerns
2. Risk mitigation - Emphasize Sanity's SLA, security certifications, and status transparency
3. Total cost of ownership - Compare the cost of building equivalent reliability on-premise
4. Hybrid approach - Studio can be self-hosted, giving some control while benefiting from the managed Content Lake

For most organizations, the reliability, scalability, and feature velocity you get with Sanity's managed service far outweighs the risks of occasional CDN incidents. But if on-premise is a hard requirement, you'll need to look at traditional CMS options that support self-hosting.