What Is Professional Services Automation Software?

Professional services automation (PSA) software gives services firms one system to manage people, projects, and money. Instead of juggling spreadsheets for timesheets, a separate tool for invoicing, and gut-feel staffing decisions, PSA platforms connect it all: who’s available, what they’re working on, and whether the project is actually making money. With that visibility, firms staff the right person on the right job faster, bill for hours worked instead of losing them to bad timesheets, and catch a shrinking margin while there’s still time to fix it, turning services delivery from reactive firefighting into something predictable and repeatable.

Key features to look for

The best PSA software for your organization should include these key features.

1. Resource management
   Real-time visibility into who’s available, who’s overloaded, and who has the right skills for upcoming work.
2. Time and expense tracking
   Simple enough that people actually use it, with approval workflows that don’t stall in someone’s inbox.
3. Billing and invoicing
   Turns approved hours into invoices automatically, supporting fixed-fee, retainer, or hourly contracts.
4. Project financials
   Budget versus actual spend in real time, so managers catch problems in week three instead of at the final invoice.
5. Reporting and dashboards
   Utilization, margin, and cash flow metrics in one view, so leaders can act on trends instead of guessing.

What are the best professional services automation software?

We did the research for you. Below are the top 5 best professional services automation software on the market, ranked.

1. OnePlan

Best for: Firms that want portfolio management, financials, and resourcing handled in one platform, with automation built in throughout.

OnePlan combines strategic portfolio management, agile methodology, and PSA-style automation in one place, so teams aren’t stitching together separate tools for planning and delivery. It’s built natively on Microsoft 365, integrating with Teams, Planner, Project, and Azure DevOps rather than asking teams to leave the tools they already use.

Key features:

• Strategic & portfolio planning: connects corporate strategy to funded work, with scenario modeling to compare investment paths before committing budget
• Resource planning & management: capacity modeling and workload transparency across programs, not just single projects
• Financial planning: forecast-vs-actual budget tracking tied directly to the portfolio, not a bolted-on module
• Hybrid delivery support: manage agile, waterfall, and hybrid work in the same system
• Sofia AI: built-in AI assistant that surfaces risk, rebalances portfolios, and forecasts outcomes
• Time & effort tracking: tied to portfolio-level reporting

Where it fits: Best suited to firms, including PMOs and service delivery organizations, that need portfolio-level financial and resource visibility alongside project delivery, especially if they’re already invested in the Microsoft ecosystem.

2. Kantata

Best for: Resource management and billing automation for mid-to-large firms.

Kantata (formerly Mavenlink + Kimble) is strong at matching the right people to the right projects and turning tracked time into accurate, automated billing. It includes core project management tools like task management, project tracking, Gantt charts, and project templates, plus time tracking and timesheet management, with differentiator features including resource planning, budgeting and invoicing, client collaboration, and integrations with Salesforce, Jira, Slack, and QuickBooks.

Key features:

• Resource optimization built on operations-management science for matching skills to project demand
• Automated invoicing generated from tracked time and expenses
• Both a Salesforce-native and an open infrastructure option, with over 1,200 prebuilt connectors including Salesforce, NetSuite, HubSpot, Workday, and Sage Intacct
• Client collaboration portal for shared task and document visibility

Trade-offs to weigh: Pricing starts around $45 per user, per month, and some reviewers note the interface and custom reporting can feel dated or require deeper configuration expertise to adjust.

Where it fits: Larger consulting, agency, and IT-services firms, particularly legal and accounting, advertising, media and marketing, architecture, engineering and construction, and management consulting, that need deep resourcing logic and already run on Salesforce.

3. Accelo

Best for: Quote-to-invoice automation for mid-size agencies.

Accelo covers the full client lifecycle end to end, so a deal moving through sales automatically triggers job setup, scheduling, and invoicing. Core features include integrated CRM, project management, time tracking and billing, retainer management, and resource planning, with a focus on “quote-to-cash” automation.

Key features:

• Full CRM built in, rather than relying on a third-party integration for sales-to-delivery handoff
• Automatic quote generation and one-click conversion into active jobs
• Retainer and recurring-revenue management alongside project billing
• Integrations with GSuite, QuickBooks, HubSpot, Stripe, PayPal, Airtable, and Slack

Trade-offs to weigh: Accelo doesn’t publish exact pricing and instead quotes per business based on modules and commitment level, which can make budgeting less predictable up front. It’s most suitable for small-to-medium professional services businesses, particularly IT services, marketing, engineering, and management consulting firms.

Where it fits: Agencies that want sales, delivery, and billing tightly automated in a single system without needing deep portfolio-level planning.

4. Scoro

Best for: All-in-one operations for firms that don’t need deep PSA specialization.

Scoro is a good middle ground if you want quoting, delivery, and invoicing in one system without a lot of PSA-specific configuration. It unites projects, resources, and finances in one system, so teams don’t need to juggle multiple tools for planning, tracking, and billing.

Key features:

• Project lifecycle tools covering scope estimation, planning, and invoicing, with a quoting/estimation matrix that breaks down deliverables by role and effort
• Resource planning and capacity forecasting to balance workloads and spot shortages
• An AI assistant, ELI, that interprets natural-language queries against business data
• Real-time budget monitoring and profitability forecasting at the role, service, and project level
• Built-in sales pipeline and CRM tools alongside delivery tracking

Trade-offs to weigh: Pricing starts around $19.90/user/month for Core, moving to $32.90 for Growth and $49.90 for Performance, with Enterprise custom-priced — resource planning and deeper forecasting tools typically require moving up a tier.

Where it fits: Mid-size professional services and creative agencies that want to replace multiple point tools — separate CRM, project tracker, timesheets, invoicing — with one unified platform, without the configuration overhead of an enterprise PSA suite.

5. Polaris PSA (Deltek)

Best for: Quote-to-cash efficiency and profitability tracking.

Polaris PSA is focused on surfacing where margin is being won or lost across the full quote-to-cash process, useful for firms watching profitability closely. Its core strength is automating administrative tasks like time tracking, invoicing, and project reporting, and it particularly caters to firms juggling multiple projects and complex client billing structures.

Key features:

• SmartBeats for live project intelligence and SmartMatch for AI-driven resource recommendations
• Streamlined, punch-based time tracking embedded directly into users’ daily workflow
• Estimated billing reporting that forecasts projected billings from planned resource allocations, helping validate revenue assumptions ahead of time
• Deep integration with the broader Deltek/Replicon ecosystem for labor compliance and workforce management

Trade-offs to weigh: Pricing starts around $49 per user per month, and reviewers note the learning curve is real given the depth of configuration available.

Where it fits: Consulting, engineering, and IT services firms that want granular, real-time margin visibility across every stage of quote-to-cash and are comfortable investing time in configuration.

How does OnePlan support professional services automation?

See for yourself OnePlan contains all the professional services automation tools your teams need, in one platform.