SilenceRadar - Account Relationship Silence Detector for Overloaded AMs
When you're managing 40+ accounts, the ones that go quiet are the ones that churn. SilenceRadar syncs your CRM and calendar, ranks every account by days-since-contact weighted by revenue, and sends you a weekly triage digest before a $50k client ghosts you for a competitor.
Difficulty
intermediate
Category
SaaS
Market Demand
High
Revenue Score
8/10
Platform
Web App
Vibe Code Friendly
No
Hackathon Score
🏆 7/10
Validated by Real Pain
— seeded from real developer complaints
Account managers handling 40+ clients report that standard CRM and calendar tools don't surface which client relationships have silently lapsed, forcing them to rely on gut feeling and manual spreadsheet scanning to catch at-risk accounts before they churn.
What is it?
Account managers running 40+ client relationships can't hold all those relationships in their head simultaneously — and no CRM tells you 'this $80k account hasn't heard from you in 6 weeks.' SilenceRadar pulls contact history from HubSpot or Salesforce plus Google Calendar events, computes days-since-last-meaningful-touchpoint per account, and ranks them by silence duration multiplied by ARR. The result is a Monday morning Slack or email digest: your top 10 at-risk relationships, sorted by revenue exposure. MVP is one CRM integration plus email alerts — no dashboards, no analytics bloat. Buildable in 2 weeks because HubSpot and Salesforce both have stable REST APIs, and the core logic is a SQL query plus a cron job.
Why now?
HubSpot's v3 API and Salesforce REST API are both stable and free-tier accessible, making a 2-week integration sprint realistic. The April 2026 wave of CS layoffs has left surviving CSMs managing 40% more accounts — silence detection is now a survival tool, not a nice-to-have.
- ▸CRM sync that pulls last contact date per account from HubSpot or Salesforce via OAuth (Implementation: HubSpot contacts API + activities endpoint).
- ▸Silence scoring engine that ranks accounts by days-silent weighted by deal value (Implementation: SQL query in Supabase, runs nightly via cron).
- ▸Weekly digest email listing top 10 at-risk accounts with one-click compose-email CTA (Implementation: Resend templated email fired every Monday 8am).
- ▸Slack alert option for accounts crossing a user-defined silence threshold (Implementation: Slack Incoming Webhook, configurable per user in settings).
Target Audience
B2B account managers and CSMs managing 20-60 client accounts at agencies, SaaS companies, and professional services firms — estimated 500k+ in the US alone.
Example Use Case
Maria, a CSM at a SaaS company managing 45 accounts, gets her Monday digest showing that her 3rd-largest account ($120k ARR) has had zero contact in 34 days. She sends a check-in email that morning, discovers a renewal concern, and saves the account before it churns.
User Stories
- ▸As a CSM managing 45 accounts, I want a ranked list of clients I haven't contacted in 30+ days, so that I can prioritize outreach before they churn.
- ▸As an account manager, I want a Monday morning email showing my top 5 silent high-value accounts, so that I don't start the week reacting instead of preventing churn.
- ▸As a CS team lead, I want to see silence scores across all team members' accounts, so that I can identify systemic coverage gaps before QBR season.
Done When
- ✓CRM Sync: done when user clicks Connect HubSpot, completes OAuth, and sees their accounts listed in the dashboard within 2 minutes.
- ✓Silence Score: done when each account shows a days-since-contact number and a color-coded risk badge (green/yellow/red) on the dashboard.
- ✓Digest Email: done when user receives a formatted Monday morning email listing their top 10 at-risk accounts with account name, ARR, and days silent.
- ✓Billing: done when Stripe checkout processes, user sees their plan status update to Pro, and receives a confirmation email.
Is it worth building?
$79/month x 50 users = $3,950 MRR at month 3. $79/month x 200 users = $15,800 MRR at month 9. Math assumes 5% conversion from cold LinkedIn outreach at 400 targeted DMs.
Unit Economics
CAC: $40 via LinkedIn cold outreach (400 DMs at 0.5% close rate, 2 hours effort). LTV: $948 (12 months at $79/month). Payback: 1 month. Gross margin: 88%.
Business Model
SaaS subscription
Monetization Path
14-day free trial, then $79/month per seat. Team plan at $199/month for up to 5 seats unlocks at month 2.
Revenue Timeline
First dollar: week 3 via beta conversion. $1k MRR: month 3. $5k MRR: month 7.
Estimated Monthly Cost
Supabase: $25, Vercel: $20, Resend: $20, HubSpot API: free tier sufficient, Stripe fees: ~$15. Total: ~$80/month at launch.
Profit Potential
Full-time viable at $5k–$10k MRR with a solo founder. Low infrastructure cost.
Scalability
High — add Pipedrive, Zoho, and Outlook Calendar integrations, team dashboards, and Salesforce native app listing.
Success Metrics
Week 2: 10 beta users connected CRM. Month 1: 5 paying. Month 3: 50 paying, under 8% monthly churn.
Launch & Validation Plan
Post in CSM Slack and r/sales asking 'how do you track which clients have gone quiet?' — 20+ responses = green light. Build landing page before writing backend.
Customer Acquisition Strategy
First customer: DM 30 CSMs on LinkedIn who post about client churn, offer 3 months free for a 30-min weekly feedback call. Ongoing: LinkedIn content about client churn, CS community Slack groups, cold email to VP of CS at 200-500 person SaaS companies.
What's the competition?
Competition Level
Low
Similar Products
Gainsight (enterprise, $25k+/year), Totango (complex for SMB), Salesforce Health Score (requires deep Salesforce config) — none offer a 5-minute setup silence detector at $79/month.
Competitive Advantage
Salesforce and HubSpot show you what happened — SilenceRadar tells you what didn't happen. Simpler, cheaper, and faster to value than Gainsight ($25k+/year).
Regulatory Risks
GDPR applies since CRM data includes personal contact info. Data deletion endpoint required. Store minimum necessary data — don't cache full CRM records, only last-contact timestamps.
What's the roadmap?
Feature Roadmap
V1 (launch): HubSpot sync, silence scoring, Monday digest email, Stripe billing. V2 (month 2-3): Salesforce integration, Slack alerts, configurable thresholds. V3 (month 4+): team dashboards, AI-generated re-engagement email drafts, Pipedrive integration.
Milestone Plan
Phase 1 (Week 1-2): HubSpot OAuth, nightly sync, scoring engine ships — done when 3 beta users see real data. Phase 2 (Week 3-4): Digest email, Stripe billing live — done when first paying customer upgrades. Phase 3 (Month 2): Salesforce integration, Slack alerts — done when 20 paying users active.
How do you build it?
Tech Stack
Next.js, Supabase, HubSpot API, Salesforce API, Google Calendar API, Resend, Stripe — build with Cursor for API integrations, v0 for dashboard UI
Suggested Frameworks
Next.js App Router, Supabase Edge Functions, node-cron
Time to Ship
2 weeks
Required Skills
OAuth flows for HubSpot and Salesforce, cron jobs, basic SQL aggregation, Resend email templating.
Resources
HubSpot REST API docs, Salesforce REST API docs, Google Calendar API, Supabase cron docs, Resend quickstart.
MVP Scope
app/page.tsx (landing + hero), app/dashboard/page.tsx (account silence list), app/api/crm/hubspot/route.ts (HubSpot OAuth + sync), app/api/digest/route.ts (email digest trigger), lib/db/schema.ts (User, Account, ContactEvent tables), lib/scoring.ts (silence score calculator), lib/email/digest-template.tsx (Resend template), cron/nightly-sync.ts (cron job), .env.example (required env vars), seed.ts (demo accounts with fake silence data)
Core User Journey
Sign up -> OAuth connect HubSpot -> accounts sync in under 2 minutes -> receive Monday digest -> click at-risk account -> send outreach -> upgrade to paid.
Architecture Pattern
User OAuth connects CRM -> nightly cron pulls contact events -> Supabase stores last-contact-date per account -> scoring query ranks by silence x ARR -> Monday cron fires Resend digest email -> user clicks through to dashboard.
Data Model
User has many CRMConnections. CRMConnection has many Accounts. Account has many ContactEvents. Account has one SilenceScore updated nightly.
Integration Points
HubSpot API for CRM contact sync, Salesforce REST API for enterprise CRM sync, Google Calendar API for meeting history, Resend for digest emails, Stripe for billing, Supabase for database.
V1 Scope Boundaries
V1 excludes: Salesforce integration (HubSpot only), mobile app, team dashboards, in-app email composer, AI-generated outreach suggestions.
Success Definition
A paying CSM finds the product via LinkedIn, connects their HubSpot in under 5 minutes, receives their first digest without any founder help, and renews after month one.
Challenges
Distribution is the hard problem — AMs don't browse ProductHunt; you must reach them via LinkedIn content, cold outreach, and CS community Slack groups like CSM Slack. Churn risk is high if the digest feels noisy — silence scoring must be tuned to surface only genuinely at-risk accounts.
Avoid These Pitfalls
Don't build a full dashboard before validating that the email digest alone is enough value. Don't try to support HubSpot and Salesforce simultaneously in v1 — pick one. Don't let silence threshold be a complex settings page — default to 30 days and let users override later.
Security Requirements
Supabase Auth with Google OAuth. RLS on all user tables. CRM tokens encrypted at rest in Supabase Vault. Rate limiting 60 req/min per IP. GDPR: data deletion endpoint at /api/account/delete clears all synced CRM data.
Infrastructure Plan
Vercel for Next.js frontend and API routes, Supabase for Postgres and Edge Function crons, Resend for email, GitHub Actions for CI, Sentry for error tracking — total infra ~$80/month.
Performance Targets
100 DAU at launch, ~500 req/day. Dashboard load under 1.5s. Nightly sync completes under 5 minutes for accounts up to 200. No real-time requirements — batch is sufficient.
Go-Live Checklist
- ☐Security audit complete.
- ☐Payment flow tested end-to-end.
- ☐Sentry error tracking live.
- ☐Monitoring dashboard configured.
- ☐Custom domain with SSL active.
- ☐Privacy policy and terms published.
- ☐5 beta users signed off on digest quality.
- ☐Rollback plan documented.
- ☐Launch post drafted for LinkedIn and CS Slack communities.
First Run Experience
On first run: app shows a demo account list with 5 seeded fictional accounts (Acme Corp 47 days silent, $80k ARR highlighted red). User can immediately explore the silence scoring UI and see what the Monday digest email looks like. No CRM connection required to see demo mode — connect HubSpot to replace demo with real data.
How to build it, step by step
1. Define schema in lib/db/schema.ts: User, Account, ContactEvent, SilenceScore tables with Drizzle ORM. 2. Set up Supabase project with RLS enabled on all tables. 3. Build HubSpot OAuth flow in app/api/crm/hubspot/route.ts using HubSpot Node client. 4. Write nightly sync function that pulls contacts and last-activity-date from HubSpot and upserts to Supabase. 5. Write scoring query in lib/scoring.ts: (days_since_contact * account_arr) / 1000, ordered descending. 6. Build Resend email template in lib/email/digest-template.tsx showing top 10 accounts. 7. Wire Monday 8am cron in cron/nightly-sync.ts using Supabase Edge Functions scheduled trigger. 8. Build minimal dashboard in app/dashboard/page.tsx listing all accounts with silence scores. 9. Add Stripe billing with 14-day trial using Stripe Checkout. 10. Verify: connect a real HubSpot sandbox, wait for sync, confirm digest email arrives Monday with correct accounts ranked.
Generated
April 28, 2026
Model
claude-sonnet-4-6
Disclaimer: Ideas on this site are AI-generated and may contain inaccuracies. Revenue estimates, market demand figures, and financial projections are illustrative assumptions only — not financial advice. Do your own research before making any business or investment decisions. Technology availability, pricing, and market conditions change rapidly; always verify details independently.