Client Onboarding Software Comparison: 2026 Buyer's Guide

Why Agency Onboarding Software Matters in 2026

The agency landscape has changed. Clients expect fast, professional onboarding. They do not want to spend hours navigating Business Manager settings or exchanging account IDs over email. Agencies that still onboard manually are losing clients to competitors who offer a seamless first experience.

Client onboarding software solves this by automating the process of requesting and granting access to advertising platforms, analytics tools, and social media accounts. Instead of guiding each client through platform-specific steps, you send one link and they connect everything in minutes.

But not all onboarding tools are created equal. Pricing models, platform support, and feature sets vary significantly. This guide compares the six most popular options in 2026 to help you choose the right one.

The Contenders

We evaluated six tools that agencies use for client onboarding:

1. Portaal — The newest entrant, focused on flat-rate pricing and comprehensive features
2. LeadSie — One of the original onboarding tools, credit-based pricing
3. AgencyAccess — Invite-based pricing with a clean interface
4. AuthHub — Security-focused with SOC 2 certification
5. ClientInvite — Simple and affordable, connection-based pricing
6. Admatic — Credit-based with lifetime deal options

Pricing Comparison

Pricing is often the deciding factor. Here is how each tool charges:

Key pricing takeaways:

• Portaal is the only tool offering a free tier (3 clients per month) and unlimited onboardings on all paid plans
• LeadSie and Admatic use credit-based models where each onboarding request costs credits use credit-based models where each onboarding request costs credits — overages can make costs unpredictable
• AgencyAccess charges per active invitation, which scales linearly with your client base
• ClientInvite charges per connection, meaning multi-platform clients cost more
• AuthHub offers enterprise pricing for larger agencies, which requires a sales call

Feature Matrix

Detailed Reviews

Portaal

Best for: Agencies of all sizes wanting predictable pricing and the most complete feature set.

Portaal launched as the modern alternative to legacy onboarding tools. Its core differentiator is flat-rate pricing with unlimited onboardings on every paid plan launched as the modern alternative to legacy onboarding tools. Its core differentiator is flat-rate pricing with unlimited onboardings on every paid plan — you never pay per client or per credit.

Pros:

• Unlimited onboardings on all paid plansUnlimited onboardings on all paid plans — no surprise costs
• Most platforms supported (15+), including Google Tag Manager and Search Console that competitors miss
• Built-in intake forms to collect branding, goals, and KPIs alongside platform access
• Real-time access monitoring with alerts when permissions change
• White-label branding on Pro ($79/mo) and Agency ($149/mo) plans
• Free tier lets you try with real clients before paying
• Modern, clean UI that makes a great first impression
• Active development with new platforms and features added regularly

Cons:

• Newer to market (less established brand recognition)
• Custom domain requires Agency plan ($149/mo)

Best plan for most agencies: Growth ($29/mo) for small agencies, Pro ($79/mo) for agencies wanting white-label branding.

Visit Portaal | Start free

LeadSie

Best for: Small agencies already using it who have not explored alternatives.

LeadSie was one of the first dedicated agency onboarding tools. It pioneered the concept of automated platform access requests. However, its credit-based pricing and limited feature set have made it less competitive in 2026.

Pros:

• Established brand with a track record
• Covers core platforms (Meta, Google Ads)
• Simple interface

Cons:

• Credit-based pricing gets expensive at scale
• Limited platform support (~10 platforms)
• No intake forms, no access monitoring, no white-label
• No API access
• UI feels dated compared to newer alternatives
• No free tier

Bottom line: LeadSie was a good option in 2022-2023, but newer tools offer more features at better prices. If you are currently on LeadSie, see our LeadSie alternatives guide for migration options.

Full comparison: Portaal vs LeadSie

AgencyAccess

Best for: Mid-size agencies (5-15 clients/month) who want a clean interface without needing white-label or advanced features.

AgencyAccess offers a polished experience with invite-based pricing. Its interface is modern and easy to use, and it covers a solid range of platforms.

Pros:

• Clean, intuitive interface
• Good platform coverage (~12 platforms)
• Team collaboration features
• Zapier integration for workflow automation
• Automated client reminders

Cons:

• Invite-based pricing means costs scale with your client base
• Unlimited plan is $199/month (expensive compared to alternatives)
• No intake forms or custom fields
• Limited white-label options (only on higher tiers)
• No Google Tag Manager or Search Console support

Best plan for most agencies: Their mid-tier plan at $99/month, but compare this against Portaal's Pro at $79/month which includes more features.

Full comparison: Portaal vs AgencyAccess

AuthHub

Best for: Agencies in regulated industries (healthcare, finance) where compliance certifications are mandatory.

AuthHub differentiates itself with SOC 2 certification and enterprise-grade security features. If your clients require compliance documentation, AuthHub may be the right choice.

Pros:

• SOC 2 Type II certified
• Enterprise security features (SSO, SAML, role-based access control)
• Detailed audit logging
• Strong API documentation
• White-label and custom domain options

Cons:

• Fewer platforms supported (8+)Fewer platforms supported (8+) — missing Snapchat, Pinterest, and others
• No TikTok support (significant gap in 2026)
• No intake forms
• Enterprise features require custom pricing (sales call required)
• UI is functional but not polished
• Smaller team means slower feature development

Best plan for most agencies: Unless you specifically need SOC 2 compliance, other tools offer better value. If you do need it, contact their sales team for enterprise pricing.

Full comparison: Portaal vs AuthHub

ClientInvite

Best for: Solo consultants or very small agencies (1-5 clients/month) wanting a simple, affordable tool.

ClientInvite keeps things straightforward. No fancy features, no complex pricing tiers. You pay per connection and get a simple onboarding flow.

Pros:

• Simple, easy-to-learn interface
• Affordable starting price ($29/month)
• Decent platform coverage (~13 platforms)
• Email notifications for status updates
• Quick setup with minimal configuration

Cons:

• Connection-based pricing means multi-platform clients cost more
• No unlimited plan available
• No white-label features
• No API access
• No intake forms
• Basic reporting only
• Limited team features

Best plan for most agencies: The $29/month starter plan works for very small operations, but you will outgrow it quickly. At that point, Portaal's $29/month plan with unlimited onboardings is a better deal.

Full comparison: Portaal vs ClientInvite

Admatic

Best for: Budget-conscious agencies looking for a one-time purchase through lifetime deals.

Admatic frequently offers lifetime deals on platforms like AppSumo, making it attractive for agencies watching their budget. It supports a good number of platforms and includes bulk onboarding features.

Pros:

• Lifetime deal available (one-time payment, typically $99-$199)
• Good platform support (~15 platforms)
• Bulk onboarding for multiple clients simultaneously
• Affordable monthly pricing if not on lifetime deal

Cons:

• Credit-based pricing on monthly plans (same scalability issue as LeadSie)
• Lifetime deals mean limited revenue, which slows feature development
• No white-label option
• No API access
• No intake forms
• Support response times can be slow (small team)
• UI feels dated
• No access monitoring

Best plan for most agencies: The lifetime deal if available, but understand the trade-offs: slower updates, limited support, and missing features that other tools include.

Full comparison: Portaal vs Admatic

Decision Framework: How to Choose

Use this framework to narrow down your choice:

Choose Portaal if:

• You want predictable, flat-rate pricing with no per-client costs
• You need the most platform integrations (15+)
• You want intake forms, access monitoring, and white-label in one tool
• You value a modern UI that impresses clients
• You want to try free before committing

Choose LeadSie if:

• You are already using it and switching costs feel high (but we recommend evaluating alternatives)

Choose AgencyAccess if:

• You want a clean interface and do not need intake forms or API access
• You onboard fewer than 15 clients per month (beyond that, Portaal's pricing is better)

Choose AuthHub if:

• SOC 2 compliance is a hard requirement from your clients
• You need enterprise security features (SSO, SAML)

Choose ClientInvite if:

• You are a solo consultant onboarding fewer than 5 clients per month
• Simplicity is more important than features

Choose Admatic if:

• You can get the lifetime deal and budget is your primary concern
• You are willing to accept limited features and slower development

Our Recommendation

For the majority of agencies in 2026, Portaal offers the best combination of features, pricing, and user experience. Here is why:

1. Flat-rate pricing means your costs are predictable whether you onboard 5 or 50 clients per month
2. Free tier lets you evaluate with real clients lets you evaluate with real clients — no risk, no credit card
3. Most comprehensive platform support at 15+ integrations, covering platforms other tools miss
4. Intake forms eliminate the need for a separate tool to collect branding, goals, and contacts
5. Access monitoring gives you peace of mind that client connections remain active
6. White-label on the Pro plan means your clients see your brand, not a third-party tool
7. Modern development pace with regular feature releases and new platform support

The bottom line: if you are evaluating onboarding software for the first time, or if you are switching from a tool that no longer meets your needs, Portaal is the strongest option on the market today.

Start your free Portaal account — onboard up to 3 clients per month at no cost. Upgrade when you are ready. No credit card required.