SaaSassinOpen Performance
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Active buildDecision record 2026-08-10

Target 02 / promoted to Mission 01

Build the trustworthy performance layer.

SaaSassin will build an open-source replacement for Lattice Performance for organizations with 25–250 employees—not a clone of the entire Lattice suite.

Open the working productInspect evidence
Decision
Promote Lattice now

The category has a bounded performance core, painful minimum spend, meaningful data-sovereignty value, and no mature focused open replacement.

Primary userPeople teams at 25–250 employee organizations
Initial proofOne complete, audited review cycle
License directionOpen source with portable data by default

Product boundary

Deep performance workflow. Deliberately narrow HR scope.

The line is drawn around evidence-rich performance conversations and the operating controls required to run them safely.

Included
  • Organizations, teams, directory, and reporting lines
  • Fine-grained roles, simulator, and view-as-role
  • Templates; self, manager, peer, and upward reviews
  • Manual and scheduled reversible review cycles
  • Goals, feedback, evidence, and 1:1 notes
  • Calibration, packets, acknowledgement, and reporting
  • Open versioned workspace export, API, and webhooks
  • Optional evidence-linked AI summaries
Excluded for now
  • Payroll, benefits, recruiting, and attendance
  • Full HRIS functionality or compensation benchmarks
  • Engagement surveys and succession planning
  • Native mobile apps or a broad integration marketplace

Evidence → decision → implementation

Six gaps become six product rules.

Official help documentation establishes current mechanics. User-review sources are treated as directional evidence, not controlled research.

01

Phase changes hide consequential side effects

Lattice documents that ending peer selection automatically launches writing and auto-approves unapproved nominations; ending an individual review can submit drafts automatically.

End peer selectionEnd a reviewee early

SaaSassin response

Adjacent-only transitions, a dry-run impact preview, incomplete-work blockers, and a reversible reopen path.
02

Permission power is difficult to predict

Custom review permissions mix company-wide, targeted, cycle-management, visibility, calibration, and actions that may affect everyone in a cycle.

Custom review permissions

SaaSassin response

Named atomic permissions, a role simulator, view-as-role UI, server re-authorization, and audit evidence for every privileged change.
03

Portability is fragmented by feature

Review progress, responses, packet sharing, result images, employee census, documents, and other datasets follow separate export paths and formats.

Review cycle exportsData exports and retention

SaaSassin response

One complete workspace archive using an open, versioned schema, plus focused CSV exports for day-to-day analysis.
04

Directory synchronization needs inspectable failure history

Official troubleshooting routes admins through import logs, resyncs, reconfiguration, external-ID repair, and sometimes support escalation.

HRIS troubleshootingExternal ID mismatch

SaaSassin response

Previewed field mapping, employee-level validation, immutable integration runs, retry history, and explicit source-of-truth ownership.
05

Everyday navigation, filtering, reporting, and save confidence matter

Recent reviewer feedback praises the core workflow while repeatedly asking for deeper filters, more flexible reports, smoother navigation, and automatic saving for notes.

G2 reviewsCapterra reviews

SaaSassin response

Composable filters, URL-addressable views, an explicit autosave indicator, useful empty states, and report building from the same typed event model.
06

AI output must remain evidence, not authority

Performance summaries influence sensitive employment conversations. A useful summary must preserve the exact review, goal, feedback, or note behind each claim.

Lattice AI performance examples

SaaSassin response

AI remains optional. Every generated claim carries source evidence IDs and direct links; users can inspect, remove, or regenerate individual claims.

Vertical delivery

The first slice proves the risky spine.

Usability, isolation, transitions, and auditability ship together so the demo is a real workflow rather than disconnected screens.

Identity and tenancy

Firebase Authentication, HTTP-only sessions, organization-scoped collections, atomic owner bootstrap, roles, and cross-tenant rule tests.

Organization graph

Previewed CSV import creates employees, teams, titles, managers, and safe role mappings without granting privileged access.

Review state machine

Templates create assignments; phase previews expose effects and blockers; reversals preserve work; drafts autosave before submission.

Audit evidence

Organization, directory, permission, cycle, and submission events are append-only and visible in the same workspace.

Implementation is live

Create an organization and run the first review.

Open Lattice Performance