Best agencies to build a client portal for a small business (2026)
DISCLOSURE · I'm Mark Shcherbakov and I run lowcoding.dev, which is on this list. Nobody paid to be listed. Every other provider's price and facts come from their own website or partner listing, linked at the bottom and checked on the date above.
If your clients only need to log in, see documents and pay invoices, buy a portal tool first: SuiteDash from $19 a month or Assembly from $29 a month billed annually. If the portal has to follow your own process (custom stages, approvals, calculations, data from your other systems), hire a builder: a Softr partner such as Base Flows (from $500) or Sunset Studio (from $2,000) for a no-code portal, SpotDev for a HubSpot-connected portal (fixed from £15,000, 30 days), RapidDev ($13,000–25,000) for a bigger custom build, or lowcoding.dev for a first working version in a week from $1,990.
If you only read one part.
- A portal around your own process, first version in a week
- lowcoding.dev
- Standard client logins, documents and invoices
- Buy SuiteDash or Assembly
- No-code portal on Softr at a low starting price
- Base Flows or Sunset Studio
- Portal tied to HubSpot, fixed price, UK
- SpotDev
- Larger custom build with a team
- RapidDev or Monocubed
8 options, compared.
| PROVIDER | BASED IN | BEST FOR | PUBLISHED PRICE | FIRST VERSION | WHO OWNS IT |
|---|---|---|---|---|---|
| lowcoding.dev | Tbilisi, Georgia (remote) | Small businesses whose portal must follow their own process and data | From $1,990, fixed before work starts | 1 week | Runs in your accounts; you own the code and data; no fee to leave |
| SpotDev | UK | Mid-market B2B firms whose CRM is HubSpot | Fixed from £15,000 (three customer journeys); extra journeys £2,000 each; hosting recurring | Working software in about 2 weeks; launch in 30 days | Custom build; hosting is a recurring payment |
| Base Flows | Los Angeles, US | No-code client portals and dashboards on Softr and Airtable | Starting at $500 (Softr partner listing) | Not published | Runs on your Softr and Airtable plans |
| Sunset Studio | Sydney, Australia | Process-led portal builds for teams in Australia and the US | Starting at $2,000 (Softr partner listing) | Not published | Runs on your Softr plan and connected tools |
| Flow Digital | Brooklyn, New York, US | Portals on top of Airtable data | $297 implementation session; project budgets listed from under $1,000 | Not published | Your Airtable and Softr accounts |
| 2V Automation | Lisbon and New York | Businesses past $1M in revenue running operations on spreadsheets | $2,000 discovery week; projects $6,000–24,000 | 3–6 weeks per project | Custom internal software |
| RapidDev | Boston area, US | A bigger custom portal or CRM-lite build | $13,000–25,000 fixed | 6–10 weeks | Says clients own 100% of the code |
| Monocubed | Not stated | Larger web portals with custom design | Its cost guide puts customer-support or employee portals at $40,000–125,000 | 4–6 months for that tier (its guide) | Custom build |
Swipe the table sideways for all columns. Prices and facts from each provider's own page, checked 14 November 2026. Sources are listed at the bottom of the page.
Five things checked for every provider, ours included.
Builds portals for outside users
Client, customer, partner or investor logins, not only internal tools.
Published price
From the builder's own site or its partner-directory listing, checked 14 November 2026.
Time to first version
As stated by the builder.
Ownership and lock-in
Whether the portal runs on a platform plan you rent, or in your own accounts and code.
Outside proof
Partner status and review counts on the platform's directory, or named portal work.
- Order follows the quick picks, not a score. lowcoding.dev is first because I know its facts first-hand; check whether its "best for" is your situation.
Each option: what it is, what it costs, and when it's the wrong pick.
01lowcoding.dev
Tbilisi, Georgia (remote)Best for: Small businesses whose portal must follow their own process and data
Logins and roles, the screens each client needs, and the automation behind them (payouts, documents, status updates), in your accounts. The first version covers the one flow clients use most.
- PRICE
- From $1,990, fixed before work starts
- FIRST VERSION
- 1 week
- WHO OWNS IT
- Runs in your accounts; you own the code and data; no fee to leave
- PROOF
- Investor and admin portals serving thousands of investors; a white-label payments portal with KYC; an onboarding portal with credit-bureau checks
Not a fit if: Standard document sharing and invoicing is all you need; a portal tool is cheaper.
02SpotDev
UKBest for: Mid-market B2B firms whose CRM is HubSpot
A productised custom portal built on its own foundations, with the CRM as the single source of truth.
- PRICE
- Fixed from £15,000 (three customer journeys); extra journeys £2,000 each; hosting recurring
- FIRST VERSION
- Working software in about 2 weeks; launch in 30 days
- WHO OWNS IT
- Custom build; hosting is a recurring payment
- PROOF
- HubSpot Diamond partner; publishes its portal pricing
Not a fit if: You're a small team without HubSpot, or your budget is under £15,000.
03Base Flows
Los Angeles, USBest for: No-code client portals and dashboards on Softr and Airtable
Custom portals, dashboards and internal tools on Softr, Airtable and Make.
- PRICE
- Starting at $500 (Softr partner listing)
- FIRST VERSION
- Not published
- WHO OWNS IT
- Runs on your Softr and Airtable plans
- PROOF
- Softr Enterprise and Premium Partner; 5.0 from 56 reviews on its Softr listing
Not a fit if: You want the portal in your own code, off a platform plan.
04Sunset Studio
Sydney, AustraliaBest for: Process-led portal builds for teams in Australia and the US
Multi-tool systems and portals designed from the business process first.
- PRICE
- Starting at $2,000 (Softr partner listing)
- FIRST VERSION
- Not published
- WHO OWNS IT
- Runs on your Softr plan and connected tools
- PROOF
- Softr Enterprise and Premium Partner; 5.0 from 41 reviews on its Softr listing
Not a fit if: You want the portal in your own code, off a platform plan.
05Flow Digital
Brooklyn, New York, USBest for: Portals on top of Airtable data
Airtable systems with portals, integrations and training.
- PRICE
- $297 implementation session; project budgets listed from under $1,000
- FIRST VERSION
- Not published
- WHO OWNS IT
- Your Airtable and Softr accounts
- PROOF
- Airtable Gold Services Partner; listed in Softr's partner directory
Not a fit if: You're moving off Airtable.
062V Automation
Lisbon and New YorkBest for: Businesses past $1M in revenue running operations on spreadsheets
Portals with the order processing and communication automated around them.
- PRICE
- $2,000 discovery week; projects $6,000–24,000
- FIRST VERSION
- 3–6 weeks per project
- WHO OWNS IT
- Custom internal software
- PROOF
- Shows a custom portal for coaches, customers, sales reps and plants built for a ring maker
Not a fit if: You're under about $1M in revenue.
07RapidDev
Boston area, USBest for: A bigger custom portal or CRM-lite build
Custom software with logins, roles and integrations.
- PRICE
- $13,000–25,000 fixed
- FIRST VERSION
- 6–10 weeks
- WHO OWNS IT
- Says clients own 100% of the code
- PROOF
- Publishes its Clutch rating and case studies
Not a fit if: Your budget is under $13,000.
08Monocubed
Not statedBest for: Larger web portals with custom design
Custom web portals, marketplaces and SaaS builds.
- PRICE
- Its cost guide puts customer-support or employee portals at $40,000–125,000
- FIRST VERSION
- 4–6 months for that tier (its guide)
- WHO OWNS IT
- Custom build
- PROOF
- Says 200+ web projects delivered
Not a fit if: You're a small team that needs something working this month.
Portal tools to try first.
If your portal is mostly documents, messages and invoices, start with a tool and only build when it gets in the way.
- SuiteDash: plans from $19 a month with unlimited users.
- Assembly: Starter $29 a month billed annually ($49 monthly).
- Softr: from $19 a month (Basic), with portal logins on your Airtable or Softr data.
When a portal has to be built, not bought.
A US private investment firm paid thousands of investors by hand every month. The investor and admin portals I built run the payout as tracked steps: the monthly run went from about 3 days to about an hour, $300–500K goes out every month, and more than $9M went out in a year. No portal tool would have run that payout logic.
For SimplePay Group in Australia, one white-label app gives each brand its own subdomain where users sign up, pass KYC and create fee-calculated payment requests. The working prototype was approved 3 weeks after the brief. The rule I use: buy when the portal is a filing cabinet, build when it runs part of your business.
The builds behind this page.
US private investment firm · USAMonthly investor payouts cut from 3 days to about an hour
Before: Every month the firm paid distributions to thousands of investors by hand: pull balances, calculate each payout, push the bank transfers, notify each investor. One run took about 3 days, and investors couldn't see their own data. After: Investor and admin portals run the payout as tracked steps with a full log. The monthly run takes about an hour, $300–500K goes out every month, and more than $9M went out in a year.
- 3 days → ~1 hour
- monthly payout run
- $9M+
- paid out to investors in a year
SimplePay Group · AustraliaOne payments portal, many brands: white-label payment requests with KYC
For an Australian payments company, I built a white-label web app in Bubble. Each brand gets its own subdomain, where users sign up, pass KYC and create fee-calculated payment requests that admins process.
- 3 weeks
- from brief to an approved working prototype
- 2 brands
- at launch from one app, more added by subdomain
Questions to ask any provider, including me.
- Could a portal tool do this, and why not?
- Who are the users (clients, partners, staff), and what does each one see?
- Does it run on a platform plan we rent, or in our own accounts and code?
- Which of our systems does it read from and write to?
- What is the fixed price of the first version, and when will clients log in to it?
- What does hosting and support cost each month after launch?
Frequently asked.
How much does it cost to build a client portal for a small business?
Published prices on 14 November 2026: Softr partners start at $500 (Base Flows) and $2,000 (Sunset Studio); SpotDev builds custom HubSpot portals from £15,000; RapidDev quotes $13,000–25,000; Monocubed's guide puts support portals at $40,000–125,000. lowcoding.dev starts at $1,990 for a first working version. Portal tools cost $19–49 a month.
How long does a client portal take to build?
A no-code portal can be up in days. Stated custom timelines: a first working version in 1 week (lowcoding.dev), launch in 30 days (SpotDev), 6–10 weeks (RapidDev), 4–6 months for larger portals (Monocubed's guide).
Should we use a portal tool or a custom build?
Use a tool when the portal shares documents, messages and invoices. Build when it has to run your own process: calculations, approvals, payouts, or data from several systems.
Who owns a custom portal?
It depends on the builder. Ask whether it runs in your accounts and whether you get the code. lowcoding.dev builds in your own accounts, and the code and data are yours with no fee to leave.