Guide · Updated September 29, 2026

What does a COO do at a startup?

A startup COO runs the parts of the company the CEO can no longer cover alone. What that covers depends on the company: most COOs own some mix of internal operations, finance, people and go-to-market.

On this page

What a startup COO does

There is no standard job description. The role is built around the CEO: the COO takes the functions the CEO has no time for or is weakest at. Nathan Bennett and Stephen Miles found seven different reasons companies create the role, from carrying out the CEO's strategy to trying out a possible successor (Harvard Business Review, May 2006).

At a startup, the COO's work usually comes from this list:

The operating cadence: quarterly planning, company goals and the weekly management meeting.
Finance and legal operations: budgets, billing, contracts, and the outside accountant and lawyer.
People operations: the hiring process, onboarding, payroll, benefits and company policies.
Customer operations: support, customer onboarding and renewals.
Sometimes sales and marketing, when the CEO spends most of their time on product.

Venture investor Tom Tunguz sorts startup COOs into four types in a February 2021 post. The table paraphrases them.

Four shapes of the startup COO role (after Tunguz, 2021)
Shape	What they own	Fits when
A senior project lead who works for the founder	Cross-company projects, with no team of their own	The founder has more projects than hours
An operations lead	Planning, goals, finance, people, legal and internal systems	Internal work needs one owner
A go-to-market lead	Sales, marketing and customer success	Revenue and retention need one owner
A leader who runs the business day to day	Most functions	The CEO wants to focus on vision and a few priorities

Tunguz also describes a common path: a senior project lead can be promoted into the operations lead role as they take on teams. If you're unsure which shape you need, that is a lower-risk place to start (our suggestion).

To find the shape you need, list the work that lands on the CEO in a normal week and group it. Mostly planning, finance and hiring points to an operations lead. Mostly revenue points to a go-to-market lead. Scattered projects point to a senior project lead.

When startups add a COO

Most startups don't need a COO before product-market fit (our view). Until then, the founders handle operations and outside firms do the routine work. Kruze Consulting, an accounting firm for startups, says many startups need an operations manager at around 10 or 15 people: a generalist who does whatever operational work the company needs. That is not a COO.

Signs you need an operations leader

Two or more of these, lasting longer than a quarter, is a reasonable trigger to act (our suggestion):

Most functions report straight to the CEO, and decisions wait for them.
The CEO spends more of the week on internal operations than on customers, product or fundraising.
The same execution failures repeat: missed hiring plans, billing errors, customer escalations nobody answers.
Planning only happens when a board meeting forces it.
A board member or investor asks who owns operations, and nobody can answer.

What to try before a COO

These smaller steps can cover the gap for a while:

Outsource the routine work: payroll, bookkeeping, benefits and an HR tool.
Hire an operations manager to run those vendors and your internal processes.
Hire a head of finance once budgets, fundraising support and board reporting take real time.
Bring in an experienced operator on a part-time contract to set up planning and a weekly management meeting.

A COO search makes sense when the company has outgrown these steps and the CEO still spends most of the week on internal work. Before you start, write down which areas from the list above the person will own, and which shape from the table you need.

COO, CTO and VP of Engineering compared

Who usually owns what
Role	Usually owns	Usually doesn't own
COO	Company operations, the management cadence, often finance and people	Technology direction and architecture
CTO	Technology direction and architecture; at a small startup, also engineering management and infrastructure	Finance, sales, company operations
VP of Engineering	Delivery, the engineering team, hiring engineers, engineering process	Company operations, long-term architecture

Fred Wilson of Union Square Ventures described the split in a 2011 post: the CTO makes sure the technical approach is right, and the VP of Engineering makes sure the team is right. He wrote that an early startup often has one technical cofounder doing both jobs, and that doing both well is very rare.

At seed and Series A this is still a common setup. The CTO holds both jobs, and the software operations in the next section land on the same person: CI failures, the AWS bill, runtime alarms, security alerts and deprecations.

A COO usually doesn't take this work over. Kruze lists technology and IT among the operations areas, but at a software company that tends to mean internal IT, such as laptops, software accounts and access. Production systems stay with engineering.

Who runs software operations before there's an ops hire

Until you hire a DevOps or platform engineer, the CTO or whichever engineer notices first handles software operations. Five areas need an owner, and each fails in a predictable way when nobody checks it:

CI: a failing test on main blocks every deploy, and flaky tests teach the team to rerun jobs instead of reading failures.
Cloud cost: an unused NAT gateway is billed for every hour it is provisioned, whether or not traffic flows through it (AWS VPC pricing).
Runtime: a missing CloudWatch metric looks like a healthy service until a customer reports the outage.
Security: a Dependabot alert for a vulnerability in CISA's Known Exploited Vulnerabilities catalog (confirmed exploitation in the wild) sits unread.
Dependencies: a runtime passes its deprecation date. AWS Lambda's nodejs20.x runtime was deprecated on April 30, 2026, and updates to functions that use it are blocked from August 31, 2027 (AWS Lambda runtime policy). AWS emails the account's primary contact at least 180 days before, so make sure someone reads that inbox.

How to cover it without an ops hire

Name one owner: the CTO, or an engineer on a weekly rotation. Write the name where the team can see it.
Hold a 30-minute weekly review. Walk through the five areas and record a decision, owner and date for every open problem. The weekly operations review guide has an agenda and a log to copy.
Route alerts to one place. CloudWatch alarms, AWS Budgets and cost anomaly alerts, and GitHub security notifications should reach one Slack channel or inbox that the owner reads.
Set a hiring trigger in advance, for example operations work taking most of one engineer's week for a month (our suggestion). See when to hire your first DevOps engineer.

For the checks in each area, see DevOps for startups, AWS cost monitoring, security alert triage and dependency breaking changes. All guides are listed on the guides page.

Where Grant fits, and what he doesn't do

Since.dev calls Grant “your COO” for one narrow part of the job: the software operations in the section above. Grant and his team are AI agents, not people. This page is not a way to hire a person, and Grant doesn't stand in for a human COO or operations lead.

His team checks those areas on a schedule. Maya reads GitHub Actions runs, Liz reads AWS cost data, Noah reads CloudWatch metrics, and Priya reads existing Dependabot, code scanning and Security Hub findings. David and Owen check compatibility, configuration and deprecations. Check-ins run daily on Pro and every six hours on Studio, plus on GitHub events on paid plans. Findings arrive with their evidence in Slack, the dashboard or MCP, and Grant keeps track of the decisions you make.

Grant doesn't hire, manage people, or run finance, sales or legal. He can't change cloud resources or rerun workflows. Their check-ins only read, except Vera's tests of your own agents, and nothing merges or deploys. Supported compatibility repairs arrive as pull requests for your review (draft PRs where GitHub offers them).

Meet Grant and his team. The FAQ answers whether they are real people.

Questions

Does an early-stage startup need a COO?

Usually not before product-market fit (our view). Founders cover most operations at that stage, and outsourced payroll, accounting and HR tools handle the routine work. Kruze Consulting notes that many startups add an operations manager at around 10 or 15 people, well before any COO.

What's the difference between a COO and an operations manager?

Scope and authority. A COO sits on the leadership team and often owns several functions. An operations manager runs processes inside those functions, such as payroll, vendors and internal tools, and usually reports to a founder or the COO.

Is Grant a person I can hire as a COO?

No. Grant and his team are AI agents built by Since.dev. They cover software operations only: CI, cloud and AI costs, runtime, security alerts and dependencies. Company operations such as hiring, finance and legal need a person.

Who should own DevOps if we don't have a COO?

The CTO, or an engineer on a weekly rotation. At most software startups a COO wouldn't own it anyway, because the work needs engineering judgment. Give the owner a 30-minute weekly review and a clear point at which you hire a DevOps engineer.

Weekly operations review: a template for small software teamsA 30-minute weekly operations review for small software teams: the agenda, the checks for CI, AWS, security and dependencies, and a decision log to copy.
When to hire your first DevOps engineerThe signs you need a DevOps engineer, what the first one should own, and how a full-time hire compares with a contractor, a managed platform or software.
DevOps for startups without a DevOps teamSet up four things once, then check five every week. A practical DevOps checklist for startups on GitHub and AWS that have no DevOps engineer yet.