1. Softr

Best for teams moving beyond spreadsheets and shared drives needing a flexible portal built on their existing tools

G2 rating: 4.7/5

Capterra rating: 4.7/5

Softr lets you build a supplier portal software on top of your existing data, so you can stop chasing documents over email and start giving vendors a structured way to collaborate. It’s a great fit for teams using spreadsheets or shared drives who need something more secure, scalable, and easy to use.

You can start with Softr’s vendor portal template or build your own with no-code blocks. Vendors get a self-serve login where they can upload compliance docs, submit invoices, and check approval status: all while your internal team controls who sees what through role-based permissions.

Softr works with tools you already use, like Airtable, Notion, Google Sheets, ClickUp, and monday.com. Or you can store your data directly in Softr using its built-in Softr Databases, now available on all plans. Either way, your portal stays in sync with your data in real time.

Teams also get features like mobile access, approval workflows, and real-time dashboards, without needing developers or a complex setup.

👉🏻 See how Urban’s Group, a landscaping business, used Softr to build a custom vendor and client portal for 80+ employees. They managed to reduce admin hours by 30% and gave both field teams and clients a clearer view of projects and documents.

Best features

• Vendor self-service portal: Vendors can upload documents, submit invoices, and track approval status in one place
• Role-based access control: Show the right data to vendors, finance, and procurement teams — no manual filtering needed
• Real-time sync with your data: Connect Airtable, Google Sheets, or use Softr Databases to keep everything up to date
• Document and compliance tracking: Store contracts, certifications, and W-9s with status updates and version control
• Mobile-friendly and PWA-ready: Let vendors access the portal on any device
• Fast setup with templates: Use Softr’s free Vendor Management template to go live in minutes, not months

2. Kissflow

Best for teams looking for an all-in-one procurement platform with built-in supplier workflows and IT support

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G2 rating: 4.3/5

Capterra rating: 4.2/5

Kissflow’s supplier portal enables self-service onboarding and services like managing purchase orders, tracking invoices, tracking payments, and more. The portal is available on Kissflow’s Procurement App, which you can use to centralize procurement operations, including supplier management, contract management, and inventory management. 

The Kissflow platform runs on apps that teams can customize with automated workflows, forms, widgets, and software integrations. Unlike Softr, you will still require some developer resources to build tailor-made applications from the ground up. With the help of your IT team, you can personalize your supplier portal UI, build approval workflows, store documents, and measure supplier performance. Because of the platform’s feature-rich procurement application, this solution is a good fit for teams who want an all-in-one procurement solution instead of a fully customizable vendor portal. 

3. HICX

Best for enterprises that need strong supplier data management and task-based collaboration across departments

G2 rating: 3.5/5

Capterra rating: 3/5

HICX is supplier portal software for businesses that want to deliver a streamlined experience for suppliers, especially if they engage with stakeholders from different departments within the company. The tool allows portal customization without coding using custom forms, widgets, workflows, and integrations. However, as a solution part of a wider ecosystem of supply chain applications, it is best suited for organizations looking to bridge the portal with HICX’s supporting products for supplier management and process orchestration. 

The supplier portal is built around tasks. Suppliers have a single view of all tasks and can use HICX’s AI features to help suppliers answer support questions. Although you can’t add custom widgets or UI elements to the portal, you can configure each supplier’s task dashboard based on their priorities and projects. With a strong emphasis on maintaining supplier master data management and connecting robust supplier solutions together, HICX is a strong solution for enterprises that already use HICX partners in their existing tech stack. 

4. Zoho Creator

Best for small to mid-sized teams that want to build custom supplier workflows with strong ERP integrations

G2 rating: 4.3/5

Capterra rating: 4.3/5

With Zoho Creator, businesses can build a supplier portal using the platform’s custom workflows and integrations with external tools. Data integrations with enterprise resource planning (ERP) systems enable processes for managing purchase orders, allowing self-service tasks, and giving suppliers real-time visibility into order statuses and ongoing projects. 

The portal has a simple and clean interface that suppliers can access to view payment dashboards, manage documents, track invoices, and pull up on their phones on the go. However, this interface cannot be designed from scratch or built around your workflows with existing databases. The portal also helps you centralize administrative processes like updating order statuses, viewing and uploading transaction images, auditing portal activities, and generating new invoices. 

5. Gatekeeper

Best for companies focused on vendor risk, contract workflows, and compliance — with process automation baked in

G2 rating: 4.5/5

Capterra rating: 4.7/5

Gatekeeper is a vendor platform businesses use to streamline their supplier portal capabilities with automated contract management and vendor performance management. Simplify vendor onboarding and compliance processes with auto-generated vendor records and configurable approvals. Gatekeeper’s portal is workflow-driven, allowing businesses to map out different automated processes within the portal — including documentation updates, performance reviews, vendor invitations, and contract approvals. 

The platform’s Kanban Workflow Engine is highly customizable. You can set up everything from trigger-based notifications to complex processes across different departments. These workflows allow you to automatically register, invite, and onboard vendors via the portal. On the other hand, the portal itself does not have a flexible user interface beyond basic branding customizations and a custom URL. The vendor portal is an additional module that teams can add on top of Gatekeeper’s core platform for contract and compliance management. 

6. Precoro

Best for procurement teams that want a supplier portal tightly integrated with spend and sourcing tools

G2 rating: 4.7/5

Capterra rating: 4.8/5

Precoro’s procurement platform provides businesses with tools to optimize spending with better supplier management. It helps companies improve these four processes — request management, approvals, order documentation, and reporting. These capabilities are also embedded in Precoro’s supplier portal. You can use the portal to centralize and automate vendor onboarding tasks like creating onboarding forms, capturing information from financial documents, ensuring compliance requirements, and syncing data into your tech stack. 

This portal is a great choice for companies looking for an integrated solution with a supplier portal and procurement capabilities. You can further customize your portal by selecting the right modules, adding your own document fields, and managing permissions. However, it’s not an application that you can get up and running on your own, as the platform has a two—to four-week implementation and onboarding process.

7. Coupa

Best for finance-led teams prioritizing payment visibility, digital invoicing, and supplier payment automation.

G2 rating: 4.2/5

Capterra rating: 4.0/5

Coupa is a spend management platform with tools to help purchasing organizations reach more suppliers and accelerate the payment process. This solution is tailored for businesses that want a portal specifically to streamline invoicing processes, provide more convenient payment options, and increase visibility into overall spending. It does not have self-service capabilities for popular supplier management processes like automated onboarding and project management. 

Coupa’s supplier portal is a centralized location for managing purchase orders, invoices, and online payments. You can use the portal to instantly turn purchase orders into invoices and automatically detect invoice errors before sending them. The platform integrates securely with leading banks and financial institutions. It also has its own payment product, Coupa Pay, that you can use to drive digital payments and roll out virtual credit cards.