Post Affiliate Pro
$200 in credits
Cello.so is a platform designed to create and manage referral programs tailored for SaaS products. Built for seamless integration with existing tools, it enables users to launch effective campaigns with minimal coding. The platform offers an intuitive and streamlined experience, featuring automated payment management, legal compliance, and fraud detection.
With a product-first approach, Cello.so helps businesses drive growth by turning existing customers into active ambassadors. Ideal for marketing and product teams, it provides a fast and efficient way to boost visibility and commercial performance for SaaS solutions.
The power of user-led growth:
How it works: Setting up a referral program used to be messy-not anymore
Most SaaS companies eventually come to the same uncomfortable realization: paid acquisition costs keep rising, SEO campaigns drag on for months, and yet their most satisfied users remain untapped as a growth channel. Word-of-mouth happens whether you manage it or not. Cello was built to make it manageable, measurable, and scalable. It is a user-led growth platform that allows SaaS companies to embed a fully functional referral program directly within their product in a matter of hours, turning satisfied users into an automated acquisition loop without building anything custom.
The core feature is the native in-app referral component, implemented via a drop-in SDK available for web, iOS, Android, and React Native. Unlike referral tools that redirect users to an external portal or landing page, Cello's component integrates as a first-class element of the product's own interface. Users can find their referral link, track the progress of their referrals, and manage rewards without ever leaving the app. This embedded architecture is what sets Cello apart from traditional affiliate platforms, and it drives significantly higher participation rates as a result. Companies like tl;dv and Typeform integrate the Cello component natively, so the referral experience feels like a product feature rather than a marketing campaign tacked on from the outside.
Attribution is handled server-side via webhook integration, not through client-side cookies. This distinction is technically significant: server-side tracking is deterministic and immune to browser privacy restrictions, ad blockers, and cookie deletion, which means referral credits are assigned accurately regardless of the user's browser settings or the time gap between sign-up and conversion. Integration with Stripe and Chargebee is pre-built, and a generic API allows connection to any other payment gateway or internal billing system. CRM events from HubSpot and Salesforce can be attributed, and data can flow into analytics tools like Segment and Mixpanel, or exported to any internal system via S3.
In addition to user-to-user referrals, Cello offers a Partner Add-on that enables companies to run affiliate, influencer, and VAR partner programs alongside the user referral program from a single platform. Both programs share the same attribution infrastructure, payout systems, fraud detection, and compliance framework, meaning companies do not need to manage separate vendor relationships for different referral types. Rewards are fully customizable: recurring commissions calculated as a percentage of MRR generated by referred users are the recommended structure, with caps available. Payouts are made directly to referrers’ PayPal or Venmo accounts, with support for over 70 countries and no currency conversion or transaction fees charged by Cello.
The compliance infrastructure is a standout feature. Cello acts as the Merchant of Record for payouts, handling KYC checks, collecting tax forms (W-9 and W-8BEN for international referrers), reporting to local tax authorities where required, and automatically managing fraud detection. This alleviates a compliance burden that would otherwise fall on the SaaS company’s legal and finance teams. The platform is SOC-II certified, fully GDPR and CCPA compliant, and supports program localization in ten languages by default, with additional languages available upon request. A real-time analytics dashboard covers the entire referral funnel, from participation rate through share rate to referral conversion and overall ARR contribution.
Cello uses a performance-based pricing model tied to Referral ARR, defined as the annualized monthly recurring revenue generated through the referral program. All features are available on every plan; the tier only determines the Referral ARR threshold. There are no setup fees, no currency conversion charges, and no transaction fees on payouts.
A Partner Add-on is available on all paid plans for companies that also want to run affiliate, influencer, or VAR partner programs alongside their user referral program. Annual billing offers a discount compared to monthly rates.
| Plan | Monthly price | Annual price | Referral ARR cap |
|---|---|---|---|
| Free | $0 | $0 | Up to $5,000 |
| Grow | $300/month | $200/month | Up to $50,000 |
| Scale | $750/month | Contact Sales | Up to $100,000 |
| Enterprise | Custom pricing | Unlimited | |
| Partner Add-on | Custom pricing – unlimited partners, dedicated partner portal, multiple campaigns, partner analytics | ||
1️⃣ If you are a freelancer or consultant:
As an independent professional, you are unlikely to be building a SaaS product with a referral program at scale. The Cello use case simply does not align well with this profile. Where referral-related strategies do apply for independent professionals is in managing recommendations and outreach networks more systematically. The Growth Machine covers multi-channel outreach and prospecting automation for independent consultants who want to turn their network into a structured source of new business, capturing part of the word-of-mouth dynamic in a format relevant to solo operators. Post Affiliate Pro is worth considering if you have a digital product or online service and want a lightweight affiliate program without the SaaS-native complexity that Cello is optimized for.
2️⃣ If you're a startup:
This is Cello's primary target audience. The free tier is specifically designed for early-stage SaaS teams that want to test whether referrals can be a viable acquisition channel before committing budget to it. The fact that you can integrate the SDK, launch a program, and generate the first $5,000 in referral ARR without paying anything makes the evaluation genuinely risk-free. For teams seeking a simpler, affiliate-only program without in-product embedding capabilities, GrowSurf is a frequently cited alternative, offering per-participant pricing and robust Salesforce integration for sales-led teams. PartnerStack is a good fit for startups that have identified channel sales or affiliate marketing as a key go-to-market strategy and want a dedicated partner marketplace, though it requires a more substantial investment in implementation.
3️⃣ If you are an SMB or a mid-sized company:
At this scale, a well-run referral program can significantly reduce blended CAC and create a self-sustaining acquisition cycle that grows exponentially over time. Smoobu generated a consistent 10% increase in monthly new ARR through Cello, and Moss grew referral ARR by 600% while cutting CAC by 50%, both examples of what the platform can achieve when there is an established user base to activate. For companies that have already built a substantial affiliate network using another tool, PartnerStack is the most robust alternative for managing complex partner ecosystems—including resellers, affiliates, and referral partners—under a single program. Post Affiliate Pro is worth evaluating for teams that want more granular control over commission structures and are comfortable managing the compliance and payout infrastructure themselves. For companies willing to run multiple complementary channels simultaneously, Cello’s Partner Add-on—which combines user referral and affiliate programs from a single dashboard—is a strong case for consolidation over using separate specialist tools.
