Zoho CRM Uptime SLA and Availability
The SLA commitment
Zoho's availability SLA commitment is 99.9% monthly uptime. We have redundancies implemented at various levels starting from the infrastructure to the ISP to achieve this. Data from the primary data center is replicated in the secondary, and a read-only version of Zoho apps is always served from the secondary data center.
The 99.9% guarantee applies to monthly availability of the service. Three categories of downtime are excluded from this calculation:
- Planned maintenance: customers are notified at least 48 hours in advance of any scheduled updates.
- Factors outside Zoho's control: ISP failures, natural disasters, denial-of-service attacks, and similar external events.
- Customer-side issues: downtime resulting from a customer's own hardware, software, or network configuration.
How uptime is measured
Uptime is calculated as the total number of minutes in a calendar month minus the minutes of downtime, divided by the total minutes in the month.
The formula: Uptime % = (Total minutes in month − Downtime minutes) ÷ Total minutes in month × 100
At 99.9% monthly uptime, the maximum allowable downtime is approximately 43.8 minutes per month.
Where to verify actual availability
Actual availability performance, including historical uptime data per data centre region, is published at status.zoho.com. Customers can filter by their specific data centre to verify the uptime relevant to their hosted environment. The page is updated in real time and maintains a historical record of incidents, maintenance windows, and resolution times.
This is intentional. Rather than publishing a static number in documentation that becomes outdated, Zoho provides a live, verifiable source that reflects current and past performance for each region independently.
How the infrastructure supports the SLA
The 99.9% commitment is backed by a multi-layered redundancy model.
Zoho handles hardware and software failures and threats like denial of service attacks. Our servers are kept in data centers that are separated geographically and have the finest backup for prompt disaster recovery. Our fault-tolerant architecture ensures continuous service delivery.
High redundancy of our data centers minimizes possible downtime and improves app performance. Our load balancers seamlessly distribute incoming traffic across our app servers.
We also have an event-based monitoring system that diligently tracks the requests, promptly alerting our team in case of any irregularities or potential issues.
Each region operates a primary and secondary data centre pair. If the primary fails, the secondary takes over with minimum or no loss of time.
How AI feature availability is measured separately
AI capabilities in Zoho CRM operate as independent microservices, each monitored through in-house health APIs that continuously assess their status. If any AI service fails a health check, the system immediately notifies the relevant teams.
A key architectural decision here is isolation. CRM workflows, automation rules, and core data operations remain uninterrupted even when an AI service is temporarily unavailable. A rep can still progress a deal, update a record, or trigger a workflow whether or not Zia's scoring or generative services are available at that moment. The AI layer is additive, not a dependency for core CRM function.
This means the 99.9% SLA applies to the CRM platform itself. AI microservices have their own health monitoring layer on top of that, with the design intent that any AI service degradation does not cascade into CRM downtime.
Last 12 months response time performance
Zoho CRM Major Incident Summary (US DC)
Reporting Period: April 1, 2025 – March 25, 2026
Date of Incident | Affected Components | Impact Level | Total Downtime |
Apr 07, 2025 | Zoho CRM, Cliq, Desk, Mail, Books, Deluge | Partial (API/Scripts failure) | 1h 24m 57s |
Apr 09, 2025 | Zoho CRM, Desk, Cliq, Writer, SalesIQ, Forms | Partial (Files/Docs access) | 3h 13m 43s |
Jun 27, 2025 | Zoho CRM | Full (Service down/Not loading) | 1h 24m 18s |
Dec 16, 2025 | Zoho CRM, Zoho One, Vani | Full (Service down) | 1h 00m 31s |
Annual Uptime Analysis
For the purpose of calculating the core "Service Availability" of Zoho CRM as a whole, we consider the incidents where the CRM was completely inaccessible.
- Total Major Downtime (Full Outages): 2 hours, 24 minutes, 49 seconds (144.82 minutes)
- Total Minutes in a Year (Non-Leap): 525,600 minutes
- Calculated Uptime %: 99.972%
NOTE: While individual incidents exceeded the 48-minute-per-month threshold typically associated with "99.9% monthly uptime," the cumulative performance for the year remains high. This data specifically reflects the US Data Center. For status updates regarding other regions (EU, IN, AU, etc.), please refer to status.zoho.com.
Last Updated: March 26, 2026
Access your files securely from anywhere
Zoho CRM Training Programs
Learn how to use the best tools for sales force automation and better customer engagement from Zoho's implementation specialists.
Zoho DataPrep Personalized Demo
If you'd like a personalized walk-through of our data preparation tool, please request a demo and we'll be happy to show you how to get the best out of Zoho DataPrep.
- Zoho Workerly Home
- Forums
- Connect With Us:
- Zoho Recruit Home
- Forums
- Connect With Us:
Centralize Knowledge. Transform Learning.
All-in-one knowledge management and training platform for your employees and customers.
New to Zoho Writer?
Create. Review. Publish.
New to Zoho CRM Plus?
Deliver unforgettable customer experiences
New to Zoho CRM Plus?
Deliver unforgettable customer experiences
New to Zoho Marketing Plus?
Everything you need to run your marketing
New to Zoho Marketing Plus?
Everything you need to run your marketing
You are currently viewing the help pages of Qntrl’s earlier version. Click here to view our latest version—Qntrl 3.0's help articles.
New to Zoho Survey?
Zoho Sheet Resources
Zoho Forms Resources
New to Zoho Sign?
Zoho Sign Resources
Sign, Paperless!
New to Zoho TeamInbox?
Zoho TeamInbox Resources
New to Zoho ZeptoMail?
Design. Discuss. Deliver.
New to Zoho Workerly?
New to Zoho Recruit?
New to Zoho CRM?
New to Zoho Projects?
New to Zoho Sprints?
New to Zoho Assist?
New to Bigin?
Related Articles
CRM for Everyone — Availability Information
CRM offers varied licenses and editions, necessitating the need to educate users about the availability of its wide range of features. In this article we will explain the edition-specific availability of features in CRM for Everyone for users to ...Zoho CRM for Android
Zoho CRM for Android is a native application that enables you to access and work with your Online Zoho CRM data from your Android phones. With this mobile application you can access and manage your Leads, Accounts, Contacts, Potentials, Cases, ...FAQs: Zoho CRM Integration with Zoho Projects
How is the integration between Zoho CRM and Zoho Projects helpful? The integration between Zoho CRM and Zoho Projects works as a bridge between sales data and team collaboration data—all in one place. Since you can associate projects directly with ...Managing Calendar in Zoho CRM
Planning and scheduling is important when it comes to business meetings. A well conceived plan goes a long way in bringing positive results whereas, properly scheduled meeting can complement your planning.Businesses attend meetings for various ...Modules supported in Zoho CRM iOS app
In your mobile app, you can access standard modules, custom modules and team modules created in CRM web version. Standard modules - These are the default modules provided by Zoho CRM, such as Leads, Contacts, and Deals. Custom modules - These are ...
New to Zoho LandingPage?
Zoho LandingPage Resources