SonOf
SonOf is an agentic engineering service that audits your codebase, writes and estimates tickets, and ships approved code to production — billed only per story point delivered.
At a Glance
About SonOf
SonOf is an agentic engineering service built by Fulcrum, a software development studio that the company says has shipped 100+ products since 2018. It connects to your existing repository, project management tools, documentation, and team chat to run a proprietary audit, generate a dependency-mapped backlog, and ship approved tickets to production — with a senior engineer reviewing every pull request before merge.
What It Is
SonOf sits at the intersection of AI-assisted development and managed engineering services. Unlike vibe-coding tools that generate new projects from scratch, SonOf is designed specifically for existing products with growing backlogs. It ingests your codebase, ticket history, docs, Slack threads, design files, and meeting notes as a unified context, then operates as an on-demand engineering function that runs 24/7. The core differentiator the site emphasizes is a human gate: every PR is signed off by a senior engineer before it merges, and clients approve each ticket before agents begin work.
The Six-Step Workflow
SonOf's process follows a structured six-stage loop:
- Connect — Integrates with GitHub, Jira, Linear, ClickUp, Notion, Slack, Figma, Miro, and Fireflies in minutes.
- Audit — A proprietary agentic audit scans the codebase and knowledge base within 24 hours, surfacing security findings, tech debt, and architecture issues with a readiness score.
- Backlog — Generates new tickets from audit findings and enriches existing tickets with story-point estimates and dependency mapping.
- Review — A senior tech lead reads each ticket, checks context, and assigns acceptance criteria before any agent touches code.
- Approve — Clients sign off ticket by ticket; the orchestrator dispatches agents that run 24/7 on a proprietary workflow.
- Ship — Work is reviewed on staging, then merged to production. Billing triggers only on successful deploy.
Who It Targets
SonOf positions itself for three distinct profiles: solo founders who inherited an unreadable codebase, founder-led startups with 1–5 developers and a backlog larger than the team can ship, and CTOs or engineering managers running 10–30 person teams that can't hire fast enough. The site states that non-technical founders can run SonOf as their entire development function without reading a single line of code.
Stack and Language Support
According to the site, SonOf supports the most common modern web stacks:
- Languages/frameworks: TypeScript/JavaScript (Node, React, Next.js, Vue, Svelte), Python (Django, FastAPI, Flask), Ruby on Rails, PHP (Laravel), Java (Spring), Go
- Mobile: Swift, Kotlin, React Native, Flutter
- Infrastructure: AWS, Vercel, Cloudflare, GCP, Kubernetes, Docker
- Databases: PostgreSQL, MySQL, MongoDB, Redis, Supabase
For less common stacks (Rust, Elixir, OCaml), the audit confirms feasibility upfront within 24 hours.
Tradeoffs and Positioning
SonOf explicitly positions itself against vibe-coding tools (Lovable, Bolt), freelancers, agencies, and in-house hiring. The site's comparison table claims SonOf is the only option offering 24/7 shipping, full codebase context from day one, a free audit, production-grade code, pay-per-ship billing, and a mandatory human gate — all combined. The pay-per-story-point model means clients are not billed for rejected or unshipped work. The site states: "You pay for the landing, not the flying." SonOf is built on the agentic workflow Fulcrum developed internally across all its client engagements, then productized as a standalone service.
Community Discussions
Be the first to start a conversation about SonOf
Share your experience with SonOf, ask questions, or help others learn from your insights.
Pricing
Pay As You Go
Flexible, no-commitment plan billed per story point on deploy.
- $100 per story point
- No retainer
- No setup fee
- No lock-in
- Free audit included
- Billed on deploy
- Rejected work billed at $0
50 SP / mo
Monthly bundle of 50 story points — output of 1–2 in-house engineers.
- 50 story points per month
- 10% off vs pay-as-you-go
- Output of 1–2 in-house engineers
- Free audit included
- Billed on deploy
100 SP / mo
Monthly bundle of 100 story points — output of 2–4 in-house engineers.
- 100 story points per month
- 20% off vs pay-as-you-go
- Output of 2–4 in-house engineers
- Free audit included
- Billed on deploy
200 SP / mo
Monthly bundle of 200 story points — output of 4–8 in-house engineers.
- 200 story points per month
- 30% off vs pay-as-you-go
- Output of 4–8 in-house engineers
- Free audit included
- Billed on deploy
Capabilities
Key Features
- Free proprietary codebase audit in 24 hours
- Dependency-mapped backlog generation with story-point estimates
- Senior engineer review on every ticket and PR
- 24/7 agentic code execution
- Human approval gate before agents start and before merge
- Integrates with GitHub, Jira, Linear, ClickUp, Notion, Slack, Figma, Miro, Fireflies
- Security, tech debt, and architecture findings surfaced in audit
- Unit, integration, and end-to-end test generation
- Bug fix tickets as first-class work
- DevOps support (CI/CD, infrastructure-as-code, monitoring)
- Pay only for shipped story points — rejected work billed at $0
- Works alongside existing in-house development teams
- Supports TypeScript, Python, Ruby, PHP, Java, Go, Swift, Kotlin, React Native, Flutter