Stammer AI Pricing vs Robofy: Which Is More Cost-Effective for Agencies?

For agencies evaluating white-label AI chatbot platforms, pricing is the first and most critical decision factor. A platform that looks affordable at launch can become a serious margin problem as your client base grows. That is exactly why a thorough comparison of Stammer AI pricing vs Robofy is worth doing before you commit to either platform.

This analysis breaks down every cost component of both platforms: subscription tiers, per-message fees, add-ons, and hidden variables. We then walk through a realistic agency scenario to show what each platform actually costs at 20 active clients. By the end, you will have a clear, numbers-based answer to which platform is more cost-effective for agency resellers in 2026.

Stammer AI Pricing Breakdown

Stammer.ai uses a tiered subscription model with per-message and per-minute charges layered on top. Here is a full breakdown of what agencies actually pay.

Starter Plan (approximately $49/mo): Entry-level access with basic chatbot features. Critically, this plan does NOT include white-label capabilities. Agencies cannot present the platform as their own product at this tier. For anyone building a reseller business, the Starter plan is effectively unusable.

Agency Plan ($197/mo): This is the minimum viable plan for white-label agency work. It includes a fully white-labeled dashboard, sell to unlimited clients, white-label API access, all integrations, live chat with human handoff, and the ability to use your own API keys. Voice agents start here as well, with 1+ AI Voice Agents included.

Full SaaS Mode ($497/mo): Unlocks 100+ AI Chat Agents, custom AI functions, advanced analytics, 1-on-1 onboarding, prompt engineering support, and a private Discord channel. Aimed at larger operations that need deeper customization and priority access.

Enterprise (Custom Pricing): Built for large agencies or software companies deploying at scale, with SSO, custom API endpoints, self-hosting options, and custom AI models.

Per-message charges: the hidden cost layer

On every plan, Stammer charges per message based on the AI model used. These are approximate costs per message:

• GPT-4.1-nano: ~$0.001 per message
• GPT-4o-mini: ~$0.002 per message
• GPT-4o: ~$0.01 per message
• GPT-5: ~$0.01 per message
• Claude 3.7 Sonnet: ~$0.03 per message
• Grok 2: ~$0.02 per message

Voice agents carry separate per-minute charges ranging from $0.11/min (GPT-4.1-nano) to $0.17/min (Claude 3.7 Sonnet).

Example calculation at a mid-tier model (GPT-4o at $0.01/msg):

10 clients, each generating 200 messages per month:

• 10 x 200 x $0.01 = $20 in per-message fees
• Agency Plan subscription: $197
• Total: $217/mo minimum

At GPT-5 or Claude 3.7 Sonnet with higher volumes, that number climbs sharply. At 30 clients generating 300 messages each using Claude 3.7 Sonnet ($0.03/msg):

• 30 x 300 x $0.03 = $270 in per-message fees
• Agency Plan: $197
• Total: $467/mo, nearly matching the Full SaaS tier, with zero of the premium features.

The compounding effect of per-message pricing is the core challenge: your Stammer costs grow in direct proportion to client engagement, making it impossible to predict or protect your margins.

Robofy Pricing: Flat Fee, Zero Commission

Robofy operates on a fundamentally different model. Instead of charging per message or taking a commission on client revenue, Robofy charges a flat reseller fee. That is the entirety of your cost to Robofy.

Here is what that means in practice:

• You pay a flat platform cost to Robofy (see current plans at /ai-chatbot-pricing)
• You set your own prices for clients, completely independently
• Clients pay you directly
• Robofy takes zero commission and zero percentage of your revenue
• There are no per-message fees, no per-minute voice charges, and no model-based billing surprises

The platform includes full white-labeling: your own domain, your logo, your colors, your pricing structure. From your clients' perspective, they are buying your product. Robofy remains entirely invisible.

This flat-fee structure means your cost is the same whether your clients send 50 messages per month or 5,000. As client engagement grows, your revenue grows while your Robofy cost stays fixed. That is the structural difference between the two platforms.

For agencies planning to scale, this is not a minor convenience. It is the difference between a business model with expanding margins and one where margins compress as you succeed.

Side-by-Side Pricing Comparison

Total Cost of Ownership Analysis

Let's run a concrete scenario that reflects a real agency at a growth stage: 20 active clients, each generating 500 messages per month, using a mid-range model.

Stammer AI cost at this scale:

Using GPT-4o ($0.01/msg) on the Agency plan:

• Platform: $197/mo
• Per-message fees: 20 clients x 500 messages x $0.01 = $100/mo
• Total: $297/mo

Switching to a higher-quality model like Claude 3.7 Sonnet ($0.03/msg):

• Platform: $197/mo
• Per-message fees: 20 x 500 x $0.03 = $300/mo
• Total: $497/mo — the same price as Full SaaS, with none of its premium features

Add voice agents, extra chatbot agents ($10/agent/mo), or expanded knowledge base storage ($5/mo each), and the bill climbs further. At 30 clients with modest usage and a better model, it is not uncommon for Stammer Agency plan users to pay $500–$700/mo in total.

Robofy cost at the same scale:

Robofy's flat reseller fee stays constant regardless of how many messages your clients send. Whether client volume doubles or triples, your platform cost does not move. The margin you set when onboarding a client at month one is the same margin you earn in month twelve.

The gap between the two platforms widens at every growth milestone. At 20 clients, Robofy may cost less than half what Stammer costs in total. At 50 clients with active usage, the difference can reach hundreds of dollars per month, directly from your profit.

Predictability also has compounding value beyond the numbers. Agencies that can forecast costs accurately can price confidently, offer fixed-price packages to clients, and model their revenue growth without spreadsheet anxiety.

Which Platform Costs Less?

The answer depends on your scale, but Robofy wins on total cost in almost every realistic agency scenario.

At low volumes (1–5 clients with minimal usage), Stammer's per-message fees are small enough that the platforms may be comparable. But as soon as an agency reaches 10+ active clients with engaged users, the per-message model on Stammer begins compressing margins in a way that Robofy's flat fee never does.

For agencies serious about building a scalable, profitable white-label AI chatbot business, Robofy is the more cost-effective choice. It removes usage-based financial risk entirely, keeps your margins clean and predictable, and lets you grow revenue without growing your platform cost.

Visit /ai-chatbot-pricing to see Robofy's current reseller plans, and compare them directly against Stammer's $197/mo+ variable model.

Conclusion

Stammer AI pricing is structured in a way that benefits low-volume users and early testers, but becomes a margin challenge at scale. The combination of a $197/mo minimum for white-label access and usage-based per-message fees creates a cost model that grows every time your clients do.

Robofy's pricing model is the opposite: a predictable flat fee, zero per-message charges, and 100% of client revenue staying with you. For agencies building a white-label AI chatbot reseller business, Robofy delivers meaningfully better cost efficiency as volume grows.