Assembly vs Retainr.io (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Retainr.io does not list a price
Free plan
Tie
Neither has one
Higher rating
Assembly
4.0 against 3.7
Same job?
Yes
Both are Productivity tools

Side by side

Compared on	Assembly	Retainr.io
Our rating	4.0Better	3.7
Starts at	$39/mo	Not listed
Free plan	No	No
Category	Productivity	Productivity
Plans	From $39/mo	See pricing
Key features	Branded client portals consolidating messages, files, forms, and invoices in one place AI Assistant that drafts replies and summarizes client threads using full context Automated task creation and invoice preparation from client interactions SOC2 and HIPAA compliance for handling sensitive client data Workflow automation tools scaling from solo practitioners to larger firms	Productised service packages with checkout Stripe, PayPal and Razorpay payments Client profiles, task tracking and helpdesk White-label branding One-time and recurring invoicing
Pros	AI Assistant uses actual client history and context rather than generic chat responses SOC2 and HIPAA compliance supports firms in regulated fields like legal and financial services Scales from solo entrepreneurs to 100-person firms with tiered plans	Supports selling packages instead of quoting hours White-label, so clients see the agency and not the tool Checkout, delivery and support in one place
Cons	No permanent free plan, only a 14-day trial before billing starts Enterprise tier jumps to $2,000 per month, a steep step up from the Advanced tier Recent rebrand (2025) may create short-term confusion with prior name recognition under Copilot	No pricing tiers published, only a $1 trial Clients depend on the portal, so migrating later is disruptive Productising suits some kinds of work far better than others
Company	Assembly, founded 2020	SimpliXio Pte Ltd

Prices come from each vendor's pricing page, last checked 20260814. Check the vendor before you buy.

FAQ

Questions people ask

Is Assembly better than Retainr.io?

In our reviews Assembly scores 4.0 and Retainr.io scores 3.7. The better pick depends on the job. Assembly: AI-powered client portal and CRM that centralizes communication, files, and billing for professional service firms. Retainr.io: White-label client portal that turns agency services into packages clients buy and track.

Which is cheaper, Assembly or Retainr.io?

Assembly: from $39/mo. Retainr.io: see pricing.

Do Assembly and Retainr.io have free plans?

Neither lists a free plan.

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