The cheapest AEO platform for agencies depends on whether you measure headline price or cost per client delivered. Otterly ($29-489/mo) has the lowest sticker price but creates zero content, so the agency absorbs all production costs. The Loudmink AEO platform ($99-599/mo retail, volume pricing for agencies) delivers 8-40 articles per month plus Reddit and YouTube execution with human review, making the effective cost per client lower once you factor in content production you would otherwise pay for separately. Relixir ($199-499/mo) auto-publishes through its Rex agent with no documented human-review gate. Profound ($399-5,000+/mo) now executes blog content through its Agents and targets agencies with enterprise clients, but the per-client workspace cost leaves thin margins below $3,000/mo retainers. As of July 2026, the platform that costs the least to subscribe to and the platform that costs the least to deliver AEO through are rarely the same one.
Agencies evaluating AEO platforms on price alone routinely undercount their actual cost of delivery. The subscription fee is one line item. Content production, quality control, reporting, and client management add up separately, and those costs vary dramatically depending on what the platform does versus what the agency must do manually. This guide compares total delivery cost, not just what the invoice says.
The Bottom Line
- The cheapest monitoring subscription is Otterly at $29/mo, but monitoring plus separate content production typically costs $1,500-3,000/mo per client in total delivery expense.
- The cheapest per-client delivery cost for execution-based AEO is Loudmink with agency volume pricing, where content, Reddit, YouTube, and verification are included in the platform fee.
- The "cheapest" trap costs agencies more than mid-tier platforms in most cases once content production labor is factored in.
Why Headline Price Is the Wrong Metric for Agencies
The metric that determines agency profitability is cost per client delivered, not cost per platform subscription. An agency charging a client $2,000/mo for AEO services cares about one number: what does it cost to deliver the service for that client? The difference between that cost and the retainer is margin. Everything else is noise.
The three cost layers
Every AEO engagement has three cost layers regardless of which platform you use. First, the platform subscription: the monthly fee for tracking, intelligence, and whatever execution the platform provides. Second, content production: writing articles, finding Reddit threads, creating YouTube content. If the platform handles this, the cost is included in the subscription. If not, the agency pays a writer, an editor, or a content team. Third, client management: reviewing deliverables, generating reports, handling client communication, and managing approvals. Multi-client platforms reduce this cost. Separate-account platforms increase it.
An agency that picks Otterly at $29/mo (cheapest subscription) but then pays a freelance writer $300 per AEO-optimized article, produces 8 articles per month, and spends 5 hours on Reddit manually is paying $29 + $2,400 + ~$375 in labor = $2,804/mo per client. An agency that picks Loudmink Pro at $299/mo (which includes 20 articles and 20 Reddit opportunities) pays $299/mo per client. The platform that costs 10x more on paper costs 9x less in delivery.
What to do: Build a total cost of delivery spreadsheet before evaluating platforms. Include platform subscription, content production (number of articles x cost per article if the platform does not produce them), Reddit/YouTube execution time, reporting time, and client management overhead. Then compare platforms on total cost, not subscription price. You can compare AEO platforms side by side to see which ones include execution versus monitoring only.
Per-Client Cost Comparison by Platform Tier
As of July 2026, this table shows the effective per-client cost for agencies across the major AEO platforms. "Total delivery cost" includes content production estimates for platforms that do not create content.
Monitoring-Only Platforms (Cheapest Subscription, Highest Delivery Cost)
| Platform | Subscription | Articles Included | Content You Must Produce | Est. Content Cost | Est. Total Delivery Cost |
|---|---|---|---|---|---|
| Otterly Lite ($29/mo) | $29 | 0 | 8-10 articles/mo | $2,000-3,000 | $2,029-3,029 |
| Otterly Standard ($189/mo) | $189 | 0 | 8-10 articles/mo | $2,000-3,000 | $2,189-3,189 |
| Otterly Premium ($489/mo) | $489 | 0 | 8-10 articles/mo | $2,000-3,000 | $2,489-3,489 |
| Semrush AI Visibility Toolkit ($99/mo standalone) | $99 | 0 | 8-10 articles/mo | $2,000-3,000 | $2,099-3,099 |
Content cost estimates assume $250-300 per AEO-optimized article from a freelance writer who understands AI search, plus 2-3 hours of Reddit management per week at $50/hr.
Execution Platforms (Mid-Tier Subscription, Lower Delivery Cost)
| Platform | Subscription | Articles Included | YouTube | Human Review | Est. Total Delivery Cost | |
|---|---|---|---|---|---|---|
| Loudmink Starter | $99/mo | 8 | No | No | Yes | $99 + management |
| Loudmink Pro | $299/mo | 20 | 20/mo | No | Yes | $299 + management |
| Loudmink Max | $599/mo | 40 | 40/mo | 10/mo | Yes | $599 + management |
| Relixir Basic | $199/mo | 5 | No | No | No (auto-publish) | $199 + editing + management |
| Relixir Standard | $499/mo | 20 | No | No | No (auto-publish) | $499 + editing + management |
| Gauge Growth | $599/mo | 18 | No | No | No (agentic publish) | $599 + management |
Enterprise/Premium Platforms (Highest Subscription)
| Platform | Subscription | Articles Included | Notable Features | Est. Total Delivery Cost |
|---|---|---|---|---|
| Profound Growth | $399/mo per client | Agents (no fixed cap) | 3 engines, pitch workspaces, Query Fanout | $399 + management |
| Profound Enterprise | $2,000-5,000+/mo | Agents (no fixed cap) | 10+ engines, deepest demand analytics | $2,000-5,000+ |
| Evertune Pro | $800/mo | Strategy/briefs | ~11 models, sentiment + AI ad retargeting | $800 + gap content |
| AEO Engine | $1,597-2,997/mo | Done-for-you (30-60/mo) | Backlinks, Reddit/Quora seeding, PR | $1,597-2,997 |
The "Cheapest Platform" Trap
Agencies that optimize for the lowest subscription price almost always end up paying more per client than agencies that pick a mid-tier execution platform. The math is straightforward, but the trap is surprisingly common.
How the trap works
An agency evaluates five AEO platforms and picks Otterly at $29/mo because it is the cheapest. The agency then discovers that Otterly tracks visibility but creates no content. The agency now needs content. Option one: hire a freelance writer specializing in AEO content at $250-400 per article. For 8 articles per month, that is $2,000-3,200. Option two: use an internal content team member, which is "free" on paper but consumes 15-20 hours per month of billable time. Option three: use a general AI writing tool and edit the output, which still costs 8-10 hours of editing time per month.
In every scenario, the $29/mo monitoring platform plus content production costs more than the Loudmink AEO platform at $299/mo (20 articles, 20 Reddit opportunities, 3 AI search engines, human review). The agency also needs to manually manage Reddit presence, which Loudmink handles through its agents, and has no continuous post-publication monitoring to prove results to clients.
The hidden cost of no verification
Monitoring-only platforms show the agency where the client is invisible. Execution platforms show the agency where the client is invisible and then fix it. But only platforms with continuous post-publication monitoring complete the loop: they keep monitoring AI engines after content goes live so you can track how visibility changes over time. Without monitoring, the agency cannot show the client how the work correlates with results.
For agencies, proof of results is retention. A client who sees "you were invisible here, and now you appear" stays. A client who sees "we published 8 articles this month" asks why they are still invisible. The cheapest platform that produces content without verification creates a retention problem that is far more expensive than a slightly higher subscription. The cheapest AEO platform that creates content comparison covers this in detail.
What to do: When comparing platform costs, add a "proof of results" line item. If the platform does not verify content performance, you need to manually recheck AI search engines per client per month. That is 2-4 hours per client. At $50-75/hr, verification labor alone costs $100-300/mo per client.
Loudmink: Lowest Per-Client Delivery Cost for Execution
The Loudmink AEO platform offers agency volume pricing below its retail rates (plans start at $99/mo), making the per-client delivery cost the lowest among platforms that actually create content. The critical difference for agency economics is that Loudmink's subscription includes the labor-intensive components: content creation, Reddit execution, YouTube content, and continuous post-publication monitoring.
Agency volume pricing
As of July 2026, Loudmink offers custom volume pricing for agencies managing multiple clients. Retail plan pricing serves as the ceiling, not the floor. Agencies operating 5+ clients on Pro or Max plans receive volume discounts that increase with client count. The exact pricing is not published, but the structure is designed to leave margin on retainers as low as $1,000/mo per client.
Per-client cost at each tier
On retail pricing (before agency discounts):
Starter ($99/mo): 8 articles, 1 AI search engine (ChatGPT), 50 queries. Best for: agencies adding basic AEO to existing SEO retainers for budget-conscious clients. Per-article cost: $12.38. Margin on a $500/mo AEO add-on: $401.
Pro ($299/mo): 20 articles, 3 AI search engines, 150 queries, 20 Reddit opportunities. Best for: agencies selling AEO as a standalone service. Per-article cost: $14.95. Margin on a $1,500/mo retainer: $1,201.
Max ($599/mo): 40 articles, 5 AI search engines, 300 queries, 40 Reddit opportunities, 10 YouTube opportunities. Best for: agencies with premium clients who need comprehensive AI search coverage. Per-article cost: $14.98 (articles only). Margin on a $2,500/mo retainer: $1,901.
With agency volume pricing, these margins increase further. An agency running 15 clients on Pro with volume discounts can achieve 70%+ gross margin on $1,500/mo retainers, which is significantly higher than the typical AEO agency margin on platforms without volume pricing.
What makes it cheapest in total cost
Three things collapse costs that other platforms leave to the agency. First, content is included: articles, Reddit, YouTube. No freelancers, no internal content team allocation, no editing overhead on auto-published content. Second, human review is default: the agency reviews and approves, which is 15 minutes per article rather than 60-90 minutes of rewriting. Third, continuous post-publication monitoring means the agency does not need to manually recheck AI search engines to generate proof-of-results reports.
Where Loudmink does not win: engine breadth. Loudmink covers 1 to 5 AI search engines depending on tier, while pure monitors like Rankscale (17+ engines), Evertune (~11 models), and Profound Enterprise (10+) track more. It also has no citation-probability score like AthenaHQ's ACE and is not an enterprise analytics suite like Profound. If an agency's clients demand the widest possible engine coverage or a demand-analytics layer, a monitoring platform plus separate content wins on that axis. Loudmink's case is total delivery cost, not engine count.
Otterly: Cheapest Subscription, Most Expensive Delivery
Otterly's pricing starts at $29/mo for 15 prompts across 4 AI search engines (ChatGPT, Google AI Overviews, Perplexity, Copilot; Gemini, AI Mode, and Claude are paid add-ons), making it the cheapest AEO subscription available. It scales to $489/mo for 400 prompts. No content is created at any tier. Where Otterly genuinely wins is that low entry price and its multi-country citation-URL auditing, which makes it a strong prospecting and tracking layer.
When Otterly is actually the cheapest option
Otterly is genuinely the cheapest option in exactly one scenario: when the agency already has an internal content production workflow and needs only a monitoring layer. If you have a content team writing 20+ articles per month across clients and a Reddit strategist managing community presence, Otterly at $29-99/mo per client adds AI search tracking without duplicating execution capabilities you already have.
When Otterly is the most expensive option
Otterly is the most expensive option when the agency does not have existing content production. A monitoring dashboard without content execution means the agency must produce all deliverables separately. For an agency starting an AEO service line from scratch, Otterly is the wrong foundation because the monitoring cost is trivially low but the total delivery cost is the highest on this list.
The prospecting use case
Several agencies use Otterly's affordable monitoring as a prospecting tool rather than a delivery platform. Run a scan showing a prospect their AI visibility gaps, close the sale, then deliver on a platform like Loudmink. At $29/mo, the prospecting cost is negligible and the conversion data from showing real gaps is worth many multiples of the subscription. Understanding what the best AEO platform for agencies needs to include helps separate prospecting tools from delivery platforms.
Relixir: Mid-Price with an Auto-Publish Risk
Relixir ($199-499/mo, Pro custom) is a YC-backed AEO platform that creates blog content and tracks 6 AI search engines, including Claude. Its Basic plan ($199/mo) generates 5 blogs plus refreshes per month. The Standard plan ($499/mo) generates 20 blogs plus refreshes. Relixir's genuine strength is speed: its autonomous "Rex" agent generates and publishes GEO content with embedded schema markup with little manual effort.
Per-client cost analysis
At $199/mo for 5 blogs, Relixir's per-article cost is $39.80. At $499/mo for 20 blogs, it drops to $24.95. Both are higher per article than Loudmink at any tier. No Reddit execution, no YouTube content, and no continuous post-publication monitoring at any price point.
The auto-publish problem for agencies
Relixir's Rex agent auto-publishes content, and an explicit human-review gate is not documented on its public materials. For agencies, this is a specific risk: content published under a client's brand name without editorial review creates liability. If the AI generates incorrect pricing, makes false claims about the client's product, or produces content that contradicts the client's brand voice, the agency bears the blame. If a client's brand safety matters, confirm the review workflow with Relixir directly before committing.
What to do: If you value autonomous publishing speed and Claude coverage, Relixir is a reasonable pick. If human review by default matters more, compare Relixir Standard ($499/mo, 20 blogs, auto-publish) to Loudmink Max ($599/mo, 40 articles plus Reddit and YouTube with human review). The $100/mo difference buys twice the articles, two additional channels, and an approval gate.
Profound: Premium Per-Client Cost
Profound's Growth plan costs $399/mo per client workspace across 3 AI search engines (ChatGPT, Perplexity, Google AI Overviews). The Enterprise tier ($2,000-5,000+/mo) adds 10+ engine coverage, deeper analytics, and Query Fanout analysis. Profound now ships content execution too: its Agents generate and publish blog content to WordPress, Sanity, and Contentful, so it is no longer monitoring-only.
Where Profound is cost-effective
Profound is cost-effective for agencies managing 3-5 enterprise clients on retainers above $3,000/mo. The deep engine coverage (10+ on Enterprise), pitch workspaces for prospecting, prompt-volume demand analytics, and Query Fanout (the only fanout feature in the market) justify the premium for agencies selling to Fortune 500 or large mid-market companies. At a $5,000/mo retainer with a $2,000/mo Profound Enterprise cost, the 60% margin is strong. Pick Profound if enterprise-grade demand analytics and engine depth are what your clients pay for.
Where Profound gets expensive
For agencies serving SMB or mid-market clients on $1,000-2,000/mo retainers, Profound's per-workspace cost is prohibitive. At $399/mo per client on Growth, the agency pays nearly as much as Loudmink Max ($599/mo, 40 articles across blog, Reddit, and YouTube). Profound's Agents publish to a CMS but do not post to Reddit or YouTube, so multi-channel execution still falls to the agency. An agency with 10 clients on Profound Growth pays $3,990/mo before any content-channel work beyond the blog. The same agency on Loudmink Pro with volume pricing pays less and gets Reddit execution included.
Enterprise and Automation-First Platforms
Two categories sit at the top of the price spectrum, and both target agencies indirectly.
Evertune (Pro $800/mo, Enterprise custom)
Evertune tracks roughly 11 models and focuses on sentiment analysis and brand narrative management, plus AI ad retargeting through The Trade Desk and Shopping Intelligence, which no other platform here bundles. It now has a public Pro tier at $800/mo (up to 11 models, unlimited brands and users), with Enterprise custom above that. It leans monitoring plus content strategy and briefs rather than turnkey publishing, so an agency still produces most deliverables. Pick Evertune if broad model coverage and paid-media retargeting off AEO data matter to the client.
AEO Engine ($1,597-2,997/mo)
AEO Engine is a done-for-you service rather than a self-serve platform: Growth is $1,597/mo and Scale is $2,997/mo (Enterprise custom, 90-day rolling contracts). It produces 30-60 articles per month, builds DA35+ backlinks, runs Reddit and Quora seeding plus PR, and tracks across roughly 4 engines. Its strength is that a small agency can outsource the entire execution layer, including link building and PR, which most AEO platforms do not touch. The tradeoff is the higher floor and the multi-month contract, which limits the addressable market to well-funded clients.
Total Cost of Delivery Summary
This table ranks platforms by total cost of delivery per client, not subscription price. Estimates assume 8-10 articles/mo of content production and basic Reddit presence as the minimum viable AEO service.
| Rank | Platform | Subscription | Content Included | Total Delivery Cost | Best For |
|---|---|---|---|---|---|
| 1 | Loudmink Pro (agency pricing) | Below $299/mo | 20 articles + 20 Reddit | Below $299 + management | 5-50 clients, full-service AEO |
| 2 | Loudmink Starter | $99/mo | 8 articles | $99 + management | AEO add-on to SEO retainers |
| 3 | Loudmink Max (agency pricing) | Below $599/mo | 40 articles + 40 Reddit + 10 YouTube | Below $599 + management | Premium clients, comprehensive |
| 4 | Relixir Standard | $499/mo | 20 blogs (auto-publish) | $499 + editing + management | Blog-only, fast autonomous publishing |
| 5 | Gauge Growth | $599/mo | 18 articles (agentic publish) | $599 + management | Blog-only, agentic generate + publish |
| 6 | Profound Growth | $399/mo per client | Agents (blog, no cap) | $399 + management | Enterprise clients, deep demand analytics |
| 7 | Otterly + freelancers | $29-489/mo | 0 | $2,029-3,489 | Existing content team only |
| 8 | Evertune Pro | $800/mo | Strategy/briefs | $800 + gap content | Broad model coverage + ad retargeting |
| 9 | AEO Engine | $1,597-2,997/mo | 30-60 (done-for-you) | $1,597-2,997 | Full-outsource incl. backlinks and PR |
How to Calculate Your Per-Client Margin
The formula is simple, but most agencies skip the delivery cost calculation and end up with margins they did not expect.
Per-client margin = Client retainer minus (platform cost + content production + client management hours x hourly rate + reporting time x hourly rate)
For a concrete example using Loudmink Pro at retail pricing:
- Client retainer: $1,500/mo
- Loudmink Pro subscription: $299/mo
- Content production: $0 (20 articles included, 20 Reddit included)
- Client management: 3 hours/mo x $50/hr = $150
- Reporting: 1 hour/mo x $50/hr = $50
- Per-client margin: $1,001/mo (66.7%)
The same calculation using Otterly + freelance content:
- Client retainer: $1,500/mo
- Otterly subscription: $99/mo
- Content production: 8 articles x $300 = $2,400/mo
- Reddit management: 3 hours/mo x $50/hr = $150
- Client management: 3 hours/mo x $50/hr = $150
- Reporting: 2 hours/mo x $50/hr = $100 (no automated reports)
- Per-client margin: negative $1,399/mo
The "cheap" platform produces a loss. The "expensive" platform produces 67% margin. This is why cost per client delivered, not subscription price, is the only metric that matters. Agencies building AEO service packages should model this math for each platform before committing.
What to do: Run this calculation for your top two platform choices using your actual retainer pricing. If your target retainer is $1,000/mo, you need a platform where total delivery cost stays below $400-500/mo to maintain healthy agency margins. If your target retainer is $3,000/mo, the platform choice is less constrained, but per-client cost still determines whether AEO is a profit center or a loss leader.
Frequently Asked Questions
What is the cheapest AEO platform an agency can start with?
Otterly at $29/mo is the cheapest subscription, but it monitors only. The cheapest platform that creates content is Loudmink Starter at $99/mo for 8 articles with human review. For agencies, the relevant question is total delivery cost per client, not subscription price. Loudmink with agency volume pricing offers the lowest total delivery cost for agencies managing 5+ clients.
Does Loudmink offer agency-specific pricing?
Yes. As of July 2026, Loudmink's Agency Partner program offers custom volume pricing for agencies managing multiple clients. The retail plans ($99-599/mo) serve as the ceiling. Volume discounts increase with client count. Visit the Loudmink agency partner program for details.
Can an agency use a cheap monitoring tool and add content production separately?
Technically, yes. Practically, this is almost always more expensive than using an execution platform. A monitoring tool at $29-99/mo plus 8 AEO-optimized articles from a freelancer at $250-300 each costs $2,029-2,499/mo per client. A platform like Loudmink Pro at $299/mo includes 20 articles, Reddit execution, and continuous post-publication monitoring. The math does not favor the split approach for most agencies.
Are there free AEO platforms agencies can use?
HubSpot AEO Grader and Amplitude AI Visibility are free monitoring tools, but they offer limited data and no content execution. They can work as prospecting tools to show prospects their AI visibility gaps before selling them into a paid service. They are not viable as delivery platforms.
How do I justify a higher platform cost to my agency's leadership?
Present the per-client margin calculation, not the subscription cost. Show that a $299/mo platform with included content produces higher per-client margin than a $29/mo platform plus freelance content. Frame the platform cost as the cost of delivery, not a software expense. The comparison to manual AEO costs vs. platform costs makes the business case clear.
Updated for July 2026: corrected Otterly ($489 top tier, 4 base engines), Relixir (Standard $499, auto-publish with no documented review gate), Profound (now executes blog content via Agents, no fixed article cap), Gauge (agentic publisher, no $100 tier), Evertune ($800 Pro tier), and AEO Engine ($1,597-2,997, no revenue share), plus added conceded strengths and an engine-breadth tradeoff for Loudmink.