How to Build a $4,000+/Month AI Agent Agency in 2026 Using Relevance AI + Voiceflow for Custom Chat & Voice Solutions Sold on Gumroad

Category: Industry Trends

Excerpt:

Businesses crave custom AI agents for support, sales, lead gen, and automation—but building them requires expertise. This creates a high-margin agency niche: use Relevance AI (for multi-agent workflows & ops automation) combined with Voiceflow (for no-code chat/voice agents). Package & sell ready-to-deploy templates or custom builds on Gumroad as digital products. This guide shows launching a “Done-for-You/Custom AI Agent Agency,” delivering retainers + one-time Gumroad sales for recurring/passive income in the 2026 AI agent boom.

$4,000+

Monthly Agency Revenue from Retainers + Gumroad Sales

5–15×

Faster Agent Deployment with Combined Workflow

$50–$300

Combined Monthly Tool Cost (Relevance AI + Voiceflow)

High

Demand from SaaS, E-com, Agencies & Coaches in 2026

The 2026 AI Agent Explosion (Your Agency Goldmine)

Businesses need intelligent agents for support, sales outreach, lead qualification, and ops—but most lack the skills or time. Agencies that deliver custom chat/voice agents are charging premium retainers while selling templates on Gumroad for passive income.

Your agency becomes the **AI agent specialist**: Build once in Relevance AI + Voiceflow, customize per client, then productize templates for Gumroad sales. You're selling **automation, efficiency, and ROI**—not just code.

Your 2026 Value Prop: “We build & deploy custom AI agents using Relevance AI workflows + Voiceflow conversational design, then sell ready templates on Gumroad—so businesses automate fast while you scale retainers + digital sales.”

Your 2026 Agent Stack: Why Relevance AI & Voiceflow Together?

Relevance AI powers backend multi-agent automation; Voiceflow handles front-end chat/voice interactions. Combined (with native integrations): full-stack agents deployable anywhere.

Relevance AI: The AI Workforce Builder

$0–$349/month

Best for: Multi-agent ops, workflows & integrations.

  • Unlimited Agents/Tools: Build teams of agents for sales, research, support.
  • 2000+ Integrations: Connect to CRM, Slack, Gmail—agents act autonomously.
  • Multi-Agent Systems: Orchestrate complex tasks with escalation & learning.
  • No-Code Visual Platform: Ops teams build without devs.
  • Model-Agnostic: Use Claude, GPT, Gemini for best results.
CONVERSATIONAL EXPERT

Voiceflow: The No-Code Chat/Voice Agent Platform

$0–$150/month

Best for: Conversational design, voice agents & deployment.

  • Drag-and-Drop Builder: Create chat/voice agents with NLU & flows.
  • Voice & Chat Channels: Deploy to web, phone, WhatsApp, SMS.
  • Integrations: 300+ apps, including Relevance AI for backend power.
  • Enterprise Features: SOC2, analytics, collaboration for teams.
  • Templates & Scaling: Quick prototypes to production agents.
The Winning Workflow: Design conversational logic in **Voiceflow** (chat/voice front-end). Power backend automation with **Relevance AI** agents (multi-tool orchestration). Integrate via native connections. Export templates to Gumroad for instant sales.

2026 Service Packages: Sell Custom + Productized Agents

Hybrid model: Retainers for custom builds + Gumroad for scalable templates (one-time $49–$499 sales).

Starter “Agent Prototype” Package

$1,200/month

For startups & coaches.

  • 1–2 custom agents/month (chat or voice)
  • Voiceflow design + Relevance AI backend
  • Basic integrations & testing
  • Gumroad template version included
  • Weekly revisions
MOST PROFITABLE

Pro “AI Workforce” Retainer

$3,000–$4,000/month

For SaaS, agencies & e-com.

  • 4–8 agents/month + multi-agent systems
  • Full integrations, voice support & analytics
  • Dedicated style guide & ongoing optimization
  • Priority support + Gumroad product upsell
  • Monthly strategy calls

Gumroad “Template Shop” (Passive)

$99–$499/one-time

Productized for scale.

  • Pre-built agents (support, sales, lead gen)
  • Voiceflow + Relevance AI ready-to-deploy
  • Customization guide & updates
  • Passive recurring via memberships
  • High margins after initial build
Scalable Math: 1–2 retainers at $3,500 + 20–50 Gumroad sales/month at $200 avg = $8,000+/month. Tools low-cost, margins 80%+.

90-Day Agency Launch Plan: From Zero to First $5K

1

Master the Stack & Build Portfolio (Month 1)

Get certified fast.

  • Sign up for **Relevance AI** (Free/Pro) & **Voiceflow** (Free/Pro).
  • Build 5–8 sample agents: support bot, sales caller, lead qualifier.
  • Integrate the two; create Gumroad-ready templates.
  • Document case studies & demos.
2

Niche Down & Build Offer (Month 2)

Focus for speed.

  • Choose niche: E-com support, SaaS sales, agency lead gen.
  • Build Carrd site + Gumroad storefront: Portfolio, packages, templates.
  • Free “AI Agent Audit” lead magnet—review client needs & suggest agent.
  • Set up Stripe/Gumroad payouts, simple contracts.
3

Land First Clients & Sales (Month 3)

Mix outbound + passive.

  • LinkedIn/Reddit Outreach: Target ops managers—free audit.
  • Gumroad Launch: Sell 3–5 templates at launch discount.
  • Partner: With no-code agencies for referrals (15% fee).
  • Discount first retainer 30% for testimonials/case studies.
4

Systemize & Scale (Ongoing)

Productize everything.

  • Onboarding: Questionnaire + Loom demo for specs.
  • Production: Batch builds weekly; reuse templates.
  • Quality: Test thoroughly + client handoff guide.
  • Upsell: Starter retainer → Pro; Gumroad buyers to custom.
  • Scale: Hire VA for prototypes at 4+ retainers.
2026 Mindset: You're an **AI Agent Director**. Clients pay for the **system**—Relevance AI's power + Voiceflow's conversation—that delivers automated growth, plus Gumroad for evergreen revenue.

AI agents are the new software in 2026. Build, sell, and scale before saturation hits.

Start Relevance AI Free     Explore Voiceflow     Set Up Gumroad Store

This guide contains affiliate/tracking links to Relevance AI, Voiceflow, and Gumroad with utm_source=aifreetool.site. We may earn a commission if you sign up or sell through our links, supporting our research. Assessments based on 2026 features and applicability for scalable AI agent agencies. Pricing/features subject to change.

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