> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bitscale.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# GA-6: GTM Stack Design
> The right tool stack at Seed is wrong at Series B. Learn how to design, evaluate, and evolve a GTM stack that matches company stage, team size, and motion complexity.
**GA-6 · GTM Architect · 150 XP · \~20 min**
There is no universal "best GTM stack." The right stack depends on company stage, team size, ICP complexity, and motion type. A 10-person company with one founder doing outbound needs different tools than a 200-person company with a 20-rep SDR team.
This module teaches you to design stacks that match context — and to know when a stack needs to evolve.
***
## Stack by Stage
### Seed / Pre-Seed (1–10 employees, founder-led GTM)
**Core needs:** Find leads fast, validate messaging, book meetings without overhead.
| Category | Tool Options | Why |
| -------------------- | ---------------------------- | ------------------------------------------------ |
| CRM | HubSpot Free / Airtable | Low cost, easy setup |
| Contact source | Apollo.io | All-in-one: find + enrich + sequence |
| Email infrastructure | Google Workspace + Instantly | Affordable, reliable |
| Data enrichment | Bitscale | AI-powered enrichment without enterprise pricing |
| Analytics | Sheets / Notion | Low overhead |
**Total monthly cost:** \$200–500/month
***
### Series A (11–50 employees, first sales team)
**Core needs:** Scale what's working, build process, start measuring attribution.
| Category | Tool Options | Why |
| -------------------- | --------------------------------- | ------------------------------- |
| CRM | HubSpot Pro or Salesforce Starter | Reporting + pipeline visibility |
| Contact source | Apollo + LinkedIn Sales Nav | Broader ICP coverage |
| Sequencer | Apollo Sequences or Instantly Pro | Volume + reply tracking |
| Email infrastructure | Multiple warmup domains | 3–5 sending domains |
| Data enrichment | Bitscale + Clearbit | Deeper enrichment per contact |
| Signal | LinkedIn alerts + Crunchbase | Basic signal detection |
| Analytics | HubSpot reports or Looker | Pipeline attribution starting |
**Total monthly cost:** \$2,000–5,000/month
***
### Series B (51–200 employees, scaling SDR team)
**Core needs:** Efficiency at scale, full attribution, tech stack optimization.
| Category | Tool Options | Why |
| -------------------- | ------------------------------------------- | --------------------------------- |
| CRM | Salesforce Enterprise | Full attribution, complex routing |
| Contact source | ZoomInfo + LinkedIn Sales Nav | Largest coverage |
| Sequencer | Outreach or Salesloft | Advanced analytics, AI features |
| Email infrastructure | Warmy + 10+ sending domains | High-volume sending |
| Data enrichment | Bitscale + enrichment waterfall | Maximum coverage + quality |
| Signal | Bombora + Crunchbase + job board monitoring | Full signal coverage |
| Intent | 6sense or Demandbase | Account-based intent |
| Analytics | Salesforce + Tableau or Looker | Full funnel attribution |
| Automation | Zapier / n8n for integrations | Workflow automation |
**Total monthly cost:** \$15,000–40,000/month
***
## Stack Evaluation Framework
When evaluating any tool for your GTM stack, score it on six dimensions:
```
Evaluate this tool for our GTM stack:
Tool name: {{tool_name}}
Use case: {{intended_use_case}}
Company stage: {{company_stage}}
Score 1-5 on each dimension:
1. Coverage: Does it cover our ICP well?
2. Accuracy: Is the data/output reliable?
3. Integration: Does it connect cleanly to our existing stack?
4. Cost efficiency: Value relative to price at our volume?
5. Time to value: How quickly can we operationalize it?
6. Scalability: Will it still work 2x our current volume?
Calculate total score (max 30). Recommend: adopt / trial / defer / reject.
Return as JSON.
```
***
## Stack Evolution Triggers
Know when your stack needs to change:
| Signal | Implication |
| ------------------------------------------ | --------------------------------------------- |
| Bounce rates creeping above 3% | Email infrastructure not scaling with volume |
| CRM data quality degrading | Enrichment source coverage has gaps |
| SDR ramp time > 90 days | Process and tooling too complex for new hires |
| Attribution gaps in the funnel | Analytics integration incomplete |
| 3+ tools doing overlapping functions | Tech debt accumulating; consolidation needed |
| Sequencer not logging activity back to CRM | Integration broken; attribution blind |
Run a quarterly stack review: for each tool, document utilization, actual cost, and whether you'd buy it again today.
***
**Quick Check:** What are the three company stages and their primary GTM stack needs? What six dimensions should you evaluate when selecting a tool? Name three signals that indicate your stack needs to evolve.
***
## GA-6 Challenge: Design a GTM Stack (+150 XP)
Design a complete GTM stack for two different company stages (your choice of which two).
**Requirements:**
* Tool selection with rationale for each category (both stages)
* Stack evaluation scoring for 3 specific tools using the 6-dimension framework
* Cost estimate per stage
* Migration plan: if a Series A company is moving to a Series B stack, what's the transition sequence?
* A 2-paragraph brief: what's the most common stack mistake you see at each stage?
Submit your stack designs + migration plan. **+150 XP on approval.**
***
The final capstone. Design and build a complete, integrated GTM system from scratch. Earn the GTM Architect certification.