ZeroBlockers vs Nexus
Nexus coordinates teams on one integrated product. ZeroBlockers sets them up to ship routine changes without waiting.
What it is
Several Scrum Teams shipping one integrated product
Nexus extends Scrum to three to nine Scrum Teams building one product from one Product Backlog. Every Sprint they combine their work into one Integrated Increment, and a Nexus Integration Team is accountable for making sure that increment is produced.
Where it breaks
Every change waits for the integrated increment
Nexus aligns teams through one Product Backlog, a shared Nexus Goal, and an integrated increment every Sprint. It is deliberately light on the organization around the teams, so budgets and release approvals stay as they were, and no team can move faster than the Nexus around it.
As AI makes coding faster, every change that needs joint planning waits for the next planning conversation.
You will often see
- Finished work waits for the integrated increment.
- Cross-team refinement grows with every team.
- Budgets and release approvals are unchanged.
How ZeroBlockers fixes it
Integration where it is needed, independent release everywhere else
Who carries the work from idea to satisfied customer
| Strategy and funding | Discover the problem | Test solutions | Build | Release | Run and measure | |
|---|---|---|---|---|---|---|
| Nexus | Product Owner | Scrum Team on paper, often designed up front in practice | Scrum Teams, integrating every Sprint | Scrum Teams on paper, often approvals outside the Nexus in practice | ||
| ZeroBlockers | Product Team | Stream Team | ||||
Nexus
- Strategy and fundingProduct Owner
- Discover the problem to Test solutionsScrum Team on paper, often designed up front in practice
- BuildScrum Teams, integrating every Sprint
- Release to Run and measureScrum Teams on paper, often approvals outside the Nexus in practice
ZeroBlockers
- Strategy and fundingProduct Team
- Discover the problem to Run and measureStream Team
ZeroBlockers changes what each team owns, so teams integrate through stable interfaces. Each team owns one part of the customer journey, and shared services have their own teams.
A team releases routine changes on its own day, while big shared changes still get planned together.
The usual reply
“Separate releases just move the integration problem.”
Nexus practitioners will say that teams releasing on their own discover integration problems later and in production. Integrating every Sprint catches them while they are still cheap.
That is true when interfaces are unstable or untested. ZeroBlockers depends on automated compatibility checks and on testing the whole product the way customers use it. For a tightly coupled product, Nexus is the better fit. The difference shows when most changes stay inside one part of the customer journey and still wait for the others.
01 / Side by side
How the approaches differ
- ProcessHow work moves from idea to live use
Nexus
Three to nine Scrum Teams work in shared Sprints. Like Scrum, it leaves open how teams reach customers and test ideas.
ZeroBlockers
Each team runs weekly research and cheap tests, and releases its own changes when they are ready.
- StructureWho is on the team
Nexus
Scrum Teams share one Product Backlog, and a Nexus Integration Team is accountable for the integrated increment.
ZeroBlockers
Each Stream Team owns one part of the customer journey. Shared services have their own teams and stable interfaces, and teams integrate through those interfaces.
- GovernanceHow success is judged and who decides
Nexus
Success is an Integrated Increment every Sprint that meets the Definition of Done. Release approvals are left to the wider organization.
ZeroBlockers
Outcome targets, each paired with a quality measure, are reviewed every week. Release rules follow each team’s record.
- FundingWhether the scope gets locked
Nexus
Leaves budgets to the wider organization, so feature budgets often lock the scope.
ZeroBlockers
Funds each team for its part of the journey, so a ready change does not wait for a budget decision.
- AlignmentHow many teams stay aligned
Nexus
A shared Nexus Goal and one Product Backlog align the teams, and cross-team refinement finds the dependencies between them.
ZeroBlockers
The strategy and outcome targets align the teams, and an agreed list says which decisions each team makes alone. A dependency that keeps coming back gets removed.
- ScalingSkills and the rest of the business
Nexus
Cross-functional Scrum Teams separate people from their discipline, and the guide says nothing about developing skills or about the rest of the business.
ZeroBlockers
Enabling Teams coach each discipline across teams, and functional leads own careers. Internal Product Teams turn common requests into self-service.
02 / Why it differs
The differences explained
Nexus makes someone accountable for the combined product
The 2021 Nexus Guide groups roughly three to nine Scrum Teams around one Product Owner, one Product Backlog, and one Integrated Increment. The Nexus Integration Team is accountable for making sure that increment gets produced, and the Scrum Teams do the integration work themselves. The unit of delivery is the combined product. Teams plan, refine, and integrate together every Sprint, so each team’s work stays tied to the others’.
When the parts of a product have to work together, that is the right trade. Dropping the cross-team meetings while the teams still change each other’s code would make releases break more often. The cost is that no team can move faster than the Nexus around it.
ZeroBlockers has teams integrate through stable interfaces and changes what each team owns. A Stream Team, a small, persistent team, owns one part of the customer journey from research through live use. Leaders pay for the architecture and service work that lets that team ship and roll back routine changes without waiting for another team.
Clean code boundaries are not enough on their own
Nexus works to remove dependencies. It supports changing the product, communication, and process structures that cause them, and its cross-team refinement looks for work one team can finish alone. It leaves budgets, decision rights, and release approvals to the wider organization, and in practice those stay as they were. A team with a clean interface can still have a finished change waiting for a budget decision or an approval board.
ZeroBlockers also changes who decides and who pays. A Product Team, the leadership group for the product, sets strategy, funds each team’s part of the journey, and agrees outcome targets. Internal Product Teams run shared capabilities as self-service products. Release rules give each team authority to ship that matches the risk and its track record.
Shipping without waiting costs engineering effort
A stable interface has to keep working as each side changes. Teams need automated compatibility checks, monitoring, and a way to roll back. If one team changes a database and breaks the teams that read from it, those teams still depend on each other, even with separate deployment pipelines.
Under ZeroBlockers internal product ownership, the team that runs a shared service is responsible for its users’ needs, support, and reliability. It plans breaking changes with the teams they affect. Each team that uses the service still tests its own use of it, and the whole product still gets tested the way customers use it.
Keep the shared integration practices until the separation works.
Sources and comparison scope
Reviewed September 2026. This page compares ZeroBlockers with Nexus as documented, with attributed practitioner accounts where available. Descriptions of Nexus follow its published guidance. Claims about common practice are attributed where they come from a named source. Other statements about what organizations typically do are our analysis. The worked example is our analysis and reports no measured results.