Head-to-head · 2026

Cello vs PartnerStack

Cello is a European alternative to PartnerStack: same crm & marketing use case, headquartered in Germany and governed by EU GDPR, while PartnerStack (AppDirect) is based in the United States.

By the EU Alternatives team Last updated 7 August 2026

European alternative

Cello

Germany

Add peer-to-peer referral programs to any B2B SaaS product in hours. All-in-one platform with automated payouts, fraud detection, and GDPR compliance.

Jurisdiction: EU / EEA
Primary privacy law: EU GDPR
US CLOUD Act exposure: No
Open source: No
Free tier: No

Visit Cello Full profile

Non-EU

PartnerStack

AppDirect · United States

Affiliate and reseller programmes run end to end here, and the real draw is the marketplace of B2B partners you can recruit from rather than the tracking itself. Nothing is priced publicly: every plan is quoted after a demo, with no free tier at all. Built in Toronto, it passed into US ownership when AppDirect of San Francisco bought it in April 2026.

Jurisdiction: United States
GDPR by default: Requires DPA + TIA
US CLOUD Act exposure: Yes

All European alternatives to PartnerStack

Cello vs PartnerStack at a glance

	Cello	PartnerStack
Headquarters	Germany	United States
Data jurisdiction	EU / EEA	United States
Primary privacy law	EU GDPR	Requires DPA + transfer assessment
US CLOUD Act exposure	No	Yes
Best for	Teams that need crm & marketing built for European data-protection requirements	Teams already invested in the AppDirect ecosystem

Choose Cello if…

You want a provider governed by a European privacy regime
GDPR or public-sector data-protection requirements apply to you
You'd rather back the European tech ecosystem

Stick with PartnerStack if…

You depend on integrations only available in the AppDirect ecosystem
Your organisation has no EU data-residency constraints
Migration costs outweigh the jurisdiction benefits for now

Why choose Cello over PartnerStack?

The decisive argument is data jurisdiction. PartnerStack is headquartered in the United States, which means personal data processed through it can be subject to non-EU legal regimes: the US CLOUD Act, FISA 702, or similar laws depending on the provider. After the 2020 Schrems II ruling, EU organisations must carry out a transfer impact assessment for every such data flow.

Cello removes that overhead. As a Germany-based provider, it operates under EU GDPR, and data stays inside the EU/EEA by default. For regulated sectors such as health, public administration, and finance, that's not a nice-to-have but a requirement. For everyone else, it's concentration-risk insurance: you avoid depending on a single jurisdiction that can change the rules without warning.

Frequently asked questions

Is Cello a good alternative to PartnerStack?

Yes. Cello is one of the top-ranked European alternatives to PartnerStack in our directory, covering the same crm & marketing use case. It is headquartered in Germany, where EU GDPR applies.

What's the main difference between Cello and PartnerStack?

The biggest difference is jurisdiction: Cello is based in Germany, where EU GDPR applies, while PartnerStack is headquartered in the United States and may transfer data outside Europe. For regulated industries or organisations following Schrems II guidance, this difference is decisive.

Is Cello GDPR-compliant?

Cello is based in Germany, where EU GDPR applies. EU customers should still verify the provider's hosting and subprocessors, but the service is designed for European data-protection requirements.

How do I migrate from PartnerStack to Cello?

Start by exporting your data from PartnerStack (most providers offer an export in their settings). Then import into Cello using its native import tool or migration guide. Running both in parallel for a week catches any feature or workflow gaps before you fully switch.

Other European alternatives to PartnerStack