The honest comparison
Günther vs Adference
The DACH veteran: good math, heavyweight contract.
Respect first: Adference does genuinely good Bayesian bidding; so does Günther. The differences are the contract (12 months plus €999 onboarding vs. cancel anytime), the price (€629+ vs €59 flat), and the interface: their CORTUA shows you AI suggestions to approve, but it is, in their words, “a system, not a chatbot”. Günther is the conversation.
| Adference | Günther 🤖✨ | |
|---|---|---|
| Pricing | €629–€1,899/mo by spend tier, plus a €999 one-time onboarding fee | €59/mo flat, all marketplaces, every feature included |
| Contract | 12-month term that auto-renews; cancellation one month before the term ends (their T&Cs) | cancel anytime, no onboarding fee, no minimum term |
| Bidding | Bayesian machine learning, daily bid updates. Solid, but needs 8–12 weeks of clean data by their own account | Bayesian engine plus deterministic guardrails, every keyword, every day |
| Proposals & approval | yes: CORTUA shows AI suggestions you approve or dismiss. But explicitly no chat, no natural language | Günther chats: he reads your account, proposes changes with the reasoning, and executes after you hit Approve |
| AMC insights | not documented on their site | included |
| Best for | DACH mid-market brands that want German support and servers | operators anywhere who want the same math without the contract |
Pricing
Adference: €629–€1,899/mo by spend tier, plus a €999 one-time onboarding fee
Günther: €59/mo flat, all marketplaces, every feature included
Contract
Adference: 12-month term that auto-renews; cancellation one month before the term ends (their T&Cs)
Günther: cancel anytime, no onboarding fee, no minimum term
Bidding
Adference: Bayesian machine learning, daily bid updates. Solid, but needs 8–12 weeks of clean data by their own account
Günther: Bayesian engine plus deterministic guardrails, every keyword, every day
Proposals & approval
Adference: yes: CORTUA shows AI suggestions you approve or dismiss. But explicitly no chat, no natural language
Günther: Günther chats: he reads your account, proposes changes with the reasoning, and executes after you hit Approve
AMC insights
Adference: not documented on their site
Günther: included
Best for
Adference: DACH mid-market brands that want German support and servers
Günther: operators anywhere who want the same math without the contract
Adference earns its reputation in places:
- ✓Real Bayesian bidding: one of the few competitors doing actual ML, not just rules
- ✓Dayparting and hourly negative-keyword checks
- ✓German support and German servers, if that matters to you
Approval without conversation
CORTUA got the workflow right: propose, then let the human approve. What it deliberately leaves out is dialogue: you can’t ask why, negotiate scope, or say “only the US ones”. With Günther, the approval lives inside a conversation.
€999 before the first bid moves
Onboarding fee, spend-tiered pricing, a year of commitment. Günther onboards himself by reading your account, and the exit is the cancel button.
Let the duck take it from here.
€59/mo flat, every feature included, cancel anytime. Günther reads your account on day one.
Join the betaSources
- adference.com/en/pricing (accessed 2026-07-09)
- Adference CORTUA: “a system, not a chatbot”
- Adference T&Cs (contract term)
- OMR reviews: Adference (4.4/5 at time of writing)
Competitor facts checked on 2026-07-09 against the linked primary sources. Spotted something outdated? Tell us and we’ll fix it. The ducks insist on fair fights.