The Software Stack for a Small Marketing Agency — What You Actually Need

The small agency workflow

New lead or referral
        ↓
Qualification call (booking)
        ↓
Proposal / scope of work
        ↓
Contract signed
        ↓
Onboarding
        ↓
Active project delivery
        ↓
Client communication and approvals
        ↓
Invoicing (monthly retainer or milestone)
        ↓
Payment collected
        ↓
Reporting
        ↓
Renewal / upsell conversation

The agency workflow has more stages than a field service business — and more tools tend to be used because agencies are typically technology-forward. The risk: too many tools that don’t integrate well, creating administrative overhead that eats into billable time.

Core stack: what most small agencies need

1. CRM (lead and client management)

Purpose: Track prospects in your pipeline, manage onboarding, store client records.

Recommendation: HubSpot free

The free CRM handles contact management, deal pipeline, email tracking, and meeting scheduling. For a small agency (under 10 clients), the free plan is likely sufficient.

Add paid HubSpot only if you need: automated email sequences, advanced reporting, or team sales tools.

Alternative: HighLevel — more features but significantly more complex to set up. Better suited for agencies who also want to resell it to clients. See: HubSpot vs HighLevel.

2. Project management

Purpose: Track active client work, deadlines, task assignments.

Options to evaluate:

• Notion — Flexible but requires setup investment; good for agencies that want customization
• Asana — Structured task management; free plan covers small teams
• ClickUp — Feature-rich; can be overwhelming at small scale

We don’t currently have detailed reviews of these tools — evaluate based on your team’s workflow preferences. All have free tiers to trial.

3. Invoicing and payment

Purpose: Send professional invoices, collect payment.

Recommendation: Stripe Invoicing

Stripe is the standard for online payment. Creating and sending an invoice via Stripe is simple — clients pay by card or bank transfer. No monthly fee.

For agencies doing recurring retainers: Stripe’s subscription billing handles automatic monthly charges.

Alternative: FreshBooks, Wave (free), or QuickBooks — evaluate if you need accounting features alongside invoicing.

4. Proposal and contract

Purpose: Send proposals and get contracts signed.

Options to evaluate:

• PandaDoc — Proposals, contracts, and e-signatures in one tool
• DocuSign — E-signatures (simpler, lower cost)
• Better Proposals — Clean proposal design with e-signature

These tools are on our research list — check vendor pricing directly.

Optional additions

Automation (Zapier or Make)

When it’s worth it: 5+ active clients with repetitive administrative tasks.

Use cases for agencies:

• New client form submission → create CRM contact + Slack notification
• Invoice paid → update project status
• Meeting booked in Calendly → add to CRM + send onboarding email
• New lead from website → route to CRM pipeline

Recommendation: Start with Zapier free (simpler to set up). If you need complex logic or high operation volumes, evaluate Make.

See: Zapier vs Make.

Email marketing

When it’s relevant: If your agency does content marketing, a newsletter, or lead nurturing via email.

Options: Kit, beehiiv, Mailchimp.

For a newsletter: beehiiv is purpose-built for newsletter growth. For lead nurturing: Kit has stronger automation sequences.

Website

If clients or leads visit your website: Webflow is the preferred choice for agencies because it demonstrates design capability and provides full customization. Learning curve is real but investment pays off.

Simpler alternative: Squarespace for agencies that want something up quickly without the Webflow investment.

Recommended starting stack

This stack runs a small agency at essentially no monthly software cost. Add paid tools only as specific limits become binding.

Common mistakes agencies make

Too many project management tools. Asana + Trello + Notion + ClickUp. Pick one and commit.

Custom-building when SaaS works. Agencies sometimes build custom tools when standard SaaS covers the need — burning time that could be billable.

Paying for HighLevel without using it. HighLevel’s monthly fee is meaningful. If you’re not actively using it for client campaigns or reselling it, the cost is hard to justify.

No automation at all. At 5+ clients, manual task routing and notification become a real time tax. Basic Zapier setup is typically worth the hour investment.

Use the Stack Builder

Not sure what your specific agency needs? Try the Stack Builder — select “Agency” and answer questions about your specific workflow.