Incident Response SOP Template for Startup Teams
Free incident response SOP template for startups. Severity classification, on-call rotation, Slack-based triage, post-mortem process for small engineering teams.
Purpose
Establish a clear incident response process for startup engineering teams of 3 to 20 people who do not have a dedicated SRE team or an enterprise incident management platform. When production goes down at a startup, every minute of downtime is felt directly — by your customers, by your support inbox, and by your reputation. This SOP covers detection, severity classification, triage in Slack, resolution, customer communication, and blameless post-mortems. The goal is to reduce mean time to resolution and prevent the same incident from happening twice.
Scope
Covers all production incidents: application outages, performance degradation, data integrity issues, security breaches, and third-party service failures that affect customers. Applies to all services hosted on Vercel, AWS, or equivalent. Does not cover development environment issues, internal tool outages, or planned maintenance windows.
Prerequisites
- Monitoring and alerting configured: Sentry for application errors, Vercel Analytics or Datadog for performance, AWS CloudWatch for infrastructure
- Slack channel #incidents created with all engineers as members
- On-call rotation established — even a simple weekly rotation among 3 engineers
- Status page set up (Instatus, Statuspage, or a simple static page) for customer-facing communication
- Post-mortem template in Notion ready for use after every Severity 1 or Severity 2 incident
Roles & Responsibilities
On-Call Engineer
- Respond to alerts within 15 minutes during business hours, 30 minutes after hours
- Classify incident severity and begin triage in the #incidents Slack channel
- Lead the resolution effort or escalate to the appropriate team member
- Post regular updates in #incidents every 15-30 minutes during active incidents
Engineering Lead / CTO
- Escalation point for Severity 1 incidents — joins the response immediately
- Make the call on customer communication: when to update the status page and what to say
- Authorize emergency changes that bypass the normal deployment process
- Own the post-mortem process and ensure action items are completed
Customer-Facing Lead (Support or Founder)
- Draft customer-facing communication for the status page and direct outreach
- Monitor support channels (email, Intercom, Twitter) for customer reports during incidents
- Send the all-clear communication once the incident is resolved
Procedure
Incidents are detected through three channels: automated alerts (Sentry, Datadog, AWS CloudWatch), customer reports (support emails, Slack messages, Twitter), or internal discovery (an engineer notices something wrong). Whoever detects the issue first posts in #incidents with a brief description: what is broken, when it started, and how they found it. The on-call engineer acknowledges within 15 minutes.
- aPost in #incidents: what is broken, when it started, initial impact assessment
- bOn-call engineer acknowledges with a thumbs-up reaction within 15 minutes
- cIf the on-call engineer does not respond: escalate to the Engineering Lead directly via phone or text
- dCreate a thread in #incidents for all updates — keep the main channel clean
Completion Checklist
Key Performance Indicators
Mean time to acknowledge (MTTA)
Under 15 minutes during business hours
Mean time to resolve (MTTR)
Under 1 hour for Sev 1, under 4 hours for Sev 2
Post-mortem completion rate
100% for Sev 1 and Sev 2 incidents
Post-mortem action item completion rate
100% within 2 weeks of the incident
Repeat incident rate (same root cause)
0%
Why This Matters for Startups
When a startup's product goes down, the impact is personal. Your customers probably know you by name. Your biggest account might message the founder directly on Slack. You do not have the brand trust buffer that large companies have — one bad outage can lose a customer who took months to sign. At the same time, small teams cannot afford to waste hours on disorganized incident response where three people investigate the same thing while nobody talks to customers. A documented incident response process means your team of 5 engineers responds to a 2 AM outage with the same coordination as a team of 50.
Common Mistakes
- ×Having no on-call rotation so incidents get noticed when someone happens to check Slack
- ×Investigating in silence — one engineer debugging for an hour without posting updates while the rest of the team has no idea there is an issue
- ×Not communicating with customers during outages, letting them discover problems and lose trust
- ×Skipping post-mortems because the team is 'too busy' — which guarantees the same incident happens again
- ×Blaming individuals in post-mortems instead of fixing the systems that allowed the failure
Startups-Specific Notes
Most startups run on Vercel and AWS, which means your incident response should account for both application-level issues and infrastructure-level issues. Vercel's instant rollback is your fastest recovery tool — make sure every engineer knows how to use it. For SOC 2 compliance (increasingly expected at Series A), you need documented incident response procedures with evidence of execution. Keeping your incident log in Slack and post-mortems in Notion covers this requirement. If your startup handles payments through Stripe, any incident affecting payment processing should automatically be classified as Severity 1 — revenue impact is immediate and customer trust damage is highest.
Frequently Asked Questions
Learn More About Incident Response
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