5 AI Tools for Sustainable Business Travel

AI-powered travel platforms can help companies turn large corporate travel spend into more auditable sustainability insights. The practice has become an essential one: Corporate travel remains a major area of enterprise spending, yet many organizations still struggle to build mature sustainability programs.

That gap is where AI-powered travel platforms can make a measurable difference. Before AI, many enterprises faced a binary choice: Use spend-based emissions proxies (the least accurate method under GHG Protocol), or go without usable carbon data.

Regulatory pressure has made it important for companies to be able to access more detailed travel emissions data. Proposed GHG Protocol revisions with TWG support are pushing organizations toward more activity-based emissions calculations, which manual processes may not reliably deliver at scale. Meanwhile, business travel teams still face a clear gap between sustainability ambition and operational execution.

This guide compares five platforms using AI to help companies track, manage, and report on the environmental effect of business travel.

What Makes AI Effective for Sustainable Business Travel

AI is effective for sustainable business travel when it connects fragmented trip data, applies more granular emissions methods, and turns that output into usable booking and reporting workflows.

Before unified platforms, enterprises typically tracked emissions from a single data source, often a Global Distribution System (GDS) or expense tool, while missing ride-hail, rail, hotel, and off-platform bookings. AI can ingest data across those channels, apply route- and aircraft-specific emission factors, and generate disaggregated reports by transport mode. That broader coverage can help companies meet ESRS E1 expectations to report gross Scope 3 emissions by significant category.

Those capabilities matter most when they sit inside the booking and spend process rather than in a disconnected reporting layer. Platforms that build sustainability features into the core workflow — emissions aggregation, point-of-booking carbon display, rail-over-flight suggestions, policy enforcement with sustainability rules, and audit trail generation — can reduce downstream administrative work for finance, travel, and sustainability teams. Navan, for example, reflects that principle through a unified T&E platform that connects travel booking, expense management, and final spend data on one platform.

Whether you’re evaluating platforms for the first time or replacing a legacy tool, the most useful distinctions are data coverage, booking-time guidance, and reporting quality.

Why Regulatory Pressure Makes This Urgent

Sustainable business travel systems are becoming more urgent as reporting expectations move toward more detailed, auditable emissions data. Three frameworks are driving that shift:

• GHG Protocol Scope 3 Category 6 covers employee business travel and is actively being revised. Category 6 reporting remains under discussion in the Scope 3 revision process, with proposed changes pushing toward more activity-based calculations.
• California’s SB 253 requires large companies to begin Scope 3 reporting, adding a U.S. regulatory baseline that didn’t exist before.
• EU CSRD may require companies to report relevant emissions and transition-related sustainability information, including Scope 3 disclosures broken down by significant category.

If your organization falls under any of these frameworks, the platform you choose needs to produce data your auditors may accept.

5 Leading AI Tools for Sustainable Business Travel

Each platform below takes a different approach to embedding sustainability into corporate travel. The key differences come down to how they capture emissions data, where sustainability features sit in the booking workflow, and whether their reporting holds up under third-party assurance.

1. Navan

Navan combines booking, travel management, expense management, payments, corporate cards, and analytics, with sustainability tracking, AI-driven emissions measurement, and automated traveler support embedded into the core travel and expense experience.

What distinguishes Navan in this category is its unified data architecture. Because travel booking, expense management, and payment workflows live on one platform, sustainability data doesn’t depend on stitching together disconnected systems. Navan’s T&E data core includes 130-plus data elements, helping connect travel intent with final spend and reducing the data fragmentation problem that can weaken corporate carbon programs.

Carbon Tracking and Measurement

Navan’s carbon tracking is strongest when companies want measurement inside the same platform used for booking, expense, and analytics.

Navan provides emissions tracking and sustainability data throughout the booking flow, using third party-audited emission factor sets. Keeping those capabilities inside the same platform used for booking, travel management, expense, and analytics can make reporting and review easier.

Sustainability Interventions During the Booking Process

Travelers can compare lower-emission options before selecting an itinerary, directly inside the booking flow.

That’s where Navan displays sustainability data. The platform also surfaces rail alternatives via pop-up prompts during flight searches, allowing travelers to compare options within the booking workflow.

AI-Powered Analytics and Reporting

Because booking, expense, and emissions data live on one platform, teams can connect traveler activity to emissions trends without exporting data between systems.

Navan’s AI travel agent, Ava, helps with booking changes, policy questions, and travel disruptions inside the platform, and has a CSAT that rivals human agents. Navan also offers dashboards, analysis pages, and reports, including carbon views, to give teams visibility into travel activity and emissions trends. A Forrester Consulting Total Economic Impact™ study commissioned by Navan found 376% ROI over three years for organizations using the platform, driven in part by the visibility and time savings a unified T&E system provides.

Strategic Sustainability Framework

Navan’s strategic sustainability support can help teams connect reporting workflows to planning and audit evidence.

Enterprise customer Informa uses Navan’s carbon reporting dashboard for real-time emissions visibility, with their Group Manager of Sustainability & Reporting stating the dashboard produced evidence to support their audit process.

Considerations: Navan’s sustainability data advantages depend on consolidating travel and expense onto one platform, so organizations that keep separate booking or expense tools may not see the full benefit of unified emissions reporting. The platform also emphasizes emissions measurement and booking-time interventions over dedicated carbon offsetting or removal programs, which may matter for teams whose sustainability strategy prioritizes compensation alongside reduction.

Best for: Mid-market and enterprise companies that want sustainability tracking embedded in a unified T&E platform, rather than bolted on through separate middleware.

2. Amex GBT

Amex GBT is a large travel management company (TMC) with 24/7 agent support and AI-enabled travel tools.

Its sustainability approach centers on managed travel services paired with third-party carbon tools. On sustainability credentials, Amex GBT holds an EcoVadis Platinum recognition. Product features include a CHOOOSE integration for emissions calculations, carbon filters in flight and rail search, and an integrated carbon pricing tool that allows companies to add a configurable transaction fee travelers see during booking. The SAF program has also supported collective procurement efforts.

On the AI side, Amex GBT highlights AI features in Egencia, and it announced a strategic alliance with SAP Concur focused on integrating travel booking with expense management. Its carbon emission reporting documentation also includes an “AS IS” disclaimer, which may matter for organizations evaluating audit-grade reporting expectations.

Considerations: Amex GBT’s sustainability features rely on third-party integrations such as CHOOOSE and IATA CO2 Connect rather than a native emissions engine, which may add complexity for teams consolidating sustainability data across systems. Some Gartner Peer Insights reviewers also note that the Egencia interface can feel dated compared to consumer booking tools and that response speed could be improved.

Best for: Large enterprises with high-touch service requirements and existing TMC relationships who prioritize third-party sustainability certifications alongside managed travel services.

3. SAP Concur

SAP Concur is the enterprise T&E management platform within SAP’s broader business suite, with strong visibility in the corporate travel management software category.

Its sustainability advantage is the connection between travel data and broader enterprise reporting workflows. Concur Travel is tied to ISO 14083 through its partnership with Thrust Carbon. The full lifecycle methodology, with a configurable radiative forcing factor, allows enterprises to match their specific reporting framework. For organizations already running SAP S/4HANA, SAP Concur’s native integration with SAP sustainability tools may offer advantages over some standalone competitors. SAP’s Joule AI assistant supports natural language booking and expense queries, and SAP highlighted AI-powered carbon analysis capabilities in SAP Green Ledger.

Considerations: SAP Concur’s sustainability capabilities depend on a third-party partnership with Thrust Carbon rather than a native emissions engine, which means emissions data quality is tied to that integration. Some Gartner Peer Insights reviewers describe the interface as “old school” compared to newer platforms, and admin-side configuration complexity remains a recurring theme.

Best for: Large enterprises already operating within the SAP ecosystem that need emissions data flowing from booking through to enterprise carbon accounting.

4. Spotnana

Spotnana is an open, API-first travel infrastructure platform powering TMCs and embedded travel products, including Expensify and Brex, rather than serving primarily as a direct-to-corporate booking tool.

Its sustainability approach centers on flexibility for buyers that want to choose their own carbon methodology. The platform offers a calculator framework with confirmed integrations to both Thrust Carbon and ATPCO, allowing enterprise buyers with existing carbon methodology commitments to bring their preferred tool. Carbon influence is displayed at booking, and policy rules around the allowable CO₂ per passenger are configurable. The platform also offers carbon removal.

On the AI side, Spotnana provides agent-facing tools for response suggestions, fare rule parsing, and disruption resolution. Otto, a third-party agent, handles autonomous booking and trip management through natural language.

Considerations: Spotnana’s sustainability features rely on third-party integrations with Thrust Carbon and ATPCO rather than a built-in emissions engine, so carbon data quality depends on the partner configuration each buyer selects. The unbundled, API-first architecture also means that teams without dedicated technical resources may face a steeper implementation path than with more turnkey platforms.

Best for: Technically sophisticated enterprise buyers and TMCs that want carbon-calculator flexibility and an open API architecture over an out-of-the-box experience.

5. TravelPerk (Perk)

TravelPerk, now Perk, is an all-in-one corporate travel management platform targeting SMB and mid-market companies.

Its sustainability positioning is built around integrated offsetting and emissions visibility:

• Green Trip program: Offers opt-in offsetting through non-profit Atmosfair, allowing companies to compensate for travel-related CO₂ emissions directly through the platform.
• Susterra acquisition: Added ICAO methodology compliance, strengthening the granularity of TravelPerk’s emissions calculations.
• EmeraldSky tracking: Integrated Cirium’s aviation emissions intelligence for more detailed flight-level carbon data.
• GreenPerk API: Provides enterprise-facing access to carbon footprint data across flights, rail, accommodation, and car hire.

Considerations: TravelPerk’s Green Trip program centers on opt-in carbon offsetting rather than emissions avoidance or reduction at the point of booking, which may not satisfy frameworks that prioritize measurable reduction over compensation. Some G2 reviewers also note limited filtering options and occasional booking approval delays that can add friction to the travel workflow.

Best for: SMB and mid-market companies, particularly those with European operations, that want a consumer-grade booking experience with integrated carbon offsetting and emissions tracking.

How to Evaluate AI Tools for Sustainable Business Travel

You should choose an AI travel sustainability platform by matching reporting obligations to data quality, booking controls, and audit readiness.

The criteria below can help you compare how well each platform supports reporting, influences traveler choices, and stands up to assurance review. Start with methodology, then work through workflow design, intervention quality, audit evidence, and the substance behind any AI claim.

Match the Platform to Your Reporting Framework

The right platform should match the reporting framework your organization needs to satisfy. If you’re subject to CSRD, SB 253, or SBTi validation, verify whether the platform produces data at the quality tier your framework demands. Spend-based estimates face increasing scrutiny, and more activity-based calculations are becoming the standard. Ask vendors to specify their calculation methodology, including whether it conforms to ISO 14083, and whether their GHG emissions data or assertions are third-party verified or assured under ISO 14064-3.

Prioritize Native Integration Over Middleware

Sustainability data is only as complete as the booking and spend capture behind it. Platforms that embed sustainability into the booking and expense workflow tend to produce more complete data than those requiring separate carbon intelligence tools. If your emissions data depends on a third-party middleware layer, evaluate how data flows between systems and whether gaps exist for off-platform bookings or ground transportation.

In practice, this is where a unified T&E data core matters most: The more completely a platform connects travel intent to final spend, the more credible its sustainability reporting becomes. Navan, for example, captures emissions data inside the same workflow used for booking and expense, which can reduce the reconciliation gaps that weaken Scope 3 reporting.

Assess Point-of-Booking Interventions

Point-of-booking interventions can influence your travelers’ behavior, but only if they’re present when choices are being made. Because sustainability intent often weakens during booking decisions, nudge-based mechanisms at the moment of booking, such as emissions displays, rail alternatives, and carbon budget visibility, can be more likely to drive behavioral change than awareness programs alone. Evaluate how each platform bridges the gap between stated intentions and actual booking behavior.

Verify Audit Readiness

Audit-ready sustainability outputs are only useful if they can stand up to third-party review. Before you commit to a platform, ask for evidence that its sustainability outputs have been accepted by third-party auditors. Named customer references with specific audit validation carry more weight than vendor-stated compliance claims. Pay attention to disclaimers in vendor documentation. An “AS IS, no warranties” qualifier on emissions data has different implications than third-party-audited factor sets.

Evaluate the AI Beyond the Label

Not all “AI-powered” sustainability features rely on machine learning. Some are rules-based automation marketed under the AI umbrella. Before you invest, ask vendors to distinguish between AI-driven capabilities and rule-based interventions. Both can be valuable, but understanding the distinction helps you set realistic expectations.

Production history is one way to test the claim. Platforms with AI already operating in live travel and expense workflows offer stronger evidence than positioning language alone. Navan, for example, has had AI operating across workflows for several years, with its Ava assistant handling tens of thousands of monthly interactions. That kind of track record is a stronger signal than a recently announced AI roadmap.

Sustainable business travel starts with choosing tools that connect emissions data to the decisions your team makes every day. The platforms that treat sustainability as a reporting layer will always trail behind those that build tools into the booking workflow itself. If you’re evaluating options, the right place to start is a demo that shows how travel, expense, and emissions data work together in practice.

Competitive data was collected as of March 2026 and is subject to change or update.