Most “best TEM software” lists rank vendors without saying what the ranking is based on. This one does not rank them, because the vendors below are not solving the same shape of problem, and a single ordering would hide the thing that actually decides a shortlist.
Instead, each vendor is described using what it publishes about itself, with the source linked, followed by the kind of buyer that profile tends to suit.
Disclosure: Vigilis publishes this page and is included below. Every competitor description is drawn from that vendor’s own site, reviewed in August 2026, and linked so you can check it. Where a capability was not described on the page reviewed, that is stated rather than assumed to be absent.
The decision that comes before the shortlist
Three questions separate these vendors far more than any feature matrix will.
How wide does the portfolio need to be? Some vendors cover telecom only. Others extend into managed mobility device lifecycle, cloud and SaaS spend, and broader IT financial management. Wider is not better if you only need telecom, because you pay for the breadth in price and implementation time.
Software, managed service, or both? Software surfaces exceptions. A managed service works them. If nobody on your team will file disputes and chase credits, a platform alone tends to produce a backlog. See the TEM software buyer’s guide for the questions that expose this in a demo.
How much buying friction can you tolerate? Most of this market is quote-only, with a sales-led evaluation measured in months. A minority publish pricing and offer a trial.
The vendors
Tangoe
Tangoe publishes Tangoe One as technology expense management spanning telecom, mobile, and cloud. Its published scope includes AI invoice capture, contract and usage validation, anomaly investigation, dispute management and credit tracking, telecom, mobile and cloud inventory with order and MACD workflows, and managed services covering invoice processing, optimisation, disputes, advisory, RFP and contract support. Managed mobility services for mobile fleet lifecycle are published as part of the portfolio. No self-service pricing was shown on the product page reviewed.
Tends to fit: large enterprises wanting one vendor across telecom, mobility devices, and cloud, with a managed layer, and no requirement for public pricing.
Source: tangoe.com/tangoe-one · Vigilis vs Tangoe, row by row
Calero
Calero describes a unified technology management platform organised into SaaS management, mobility management, telecom management, and market data management. On the telecom side it publishes network visualisation, inventory lifecycle management from ordering and procurement through decommissioning, automated carrier data exchange described as wireline e-Bonding, invoice tracking and validation, bill payment, automated dispute management, and benchmarking. Managed mobility services are explicitly part of the offering. No pricing was displayed on the page reviewed.
Tends to fit: organisations that want telecom alongside SaaS and mobility in one platform, and those with market data expense as a distinct problem, which is unusual outside financial services.
Source: calero.com/telecom-expense-management · Vigilis vs Calero, row by row
Sakon
Sakon describes a cloud-based platform for understanding and managing the enterprise communication ecosystem. Published telecom capabilities include inventory management, invoice processing, usage monitoring, billing automation, and contract negotiation support, with data synchronisation described across more than 1,000 global telecom vendors. Integration is a strong theme: native ServiceNow scoped applications, plus API connections to HR, mobile device management, accounting, and IT service management systems. Device lifecycle management is published, including Device as a Service, BYOD, and IoT or M2M management. Pricing was not disclosed on the page reviewed, and managed services were not described as a distinct offering there.
Tends to fit: enterprises with a large carrier footprint and an integration-heavy environment, particularly ServiceNow-centric IT organisations.
Source: sakon.com · Vigilis vs Sakon, row by row
brightfin
brightfin positions itself as an AI-native cost optimisation platform for enterprise IT, telecom, mobile, and cloud, built natively on ServiceNow. Published solution categories include telecom expense management, mobile expense management, cloud expense management, and IT financial management. Published features include AI invoice processing and contract auditing, usage anomaly detection and forecasting, cost allocation and chargeback, and asset tracking with compliance controls. The company publishes ServiceNow-specific products including CMDB asset synchronisation. No pricing was displayed on the page reviewed.
Tends to fit: ServiceNow-standardised organisations that want telecom expense inside their existing platform rather than in a separate system, and those treating telecom as one input to broader IT financial management.
Source: brightfin.com · Vigilis vs brightfin, row by row
Cass Information Systems
Cass positions its offering as a fully managed global service rather than self-service software, describing an expert team working as an extension of your organisation. Published scope covers fixed telecom expense management and cost optimisation, mobility management across device, connectivity and support provisioning, IaaS and PaaS cloud management and benchmarking, sourcing and procurement support, and invoice auditing with payment processing. Cass publishes operating scale figures including invoices processed annually and global coverage. Pricing was not disclosed on the page reviewed.
Tends to fit: large, globally distributed organisations that want to hand the process over entirely, and those that specifically want the provider to handle invoice payment as well as audit.
Source: cassinfo.com/telecom-expense-management · Vigilis vs Cass, row by row
Vigilis
Vigilis publishes a telecom platform covering expense management with line-level invoice review, telecom inventory, contract management, RFP management, and MACD workflows tracked through to billing verification, plus Vigilis Flux for scheduling supported on-demand internet and Ethernet capacity. Managed plans include operators who work approved disputes and carrier changes inside customer carrier portals. Spend-based plan pricing is published, and a 14-day Essentials trial is offered with no credit card required.
Cloud and SaaS expense management is not part of the current scope. Wireless work is expense management, allocation, and plan optimisation rather than managed mobility device lifecycle.
Tends to fit: organisations that want the platform and the operating team together, want to see the underlying record rather than only outcomes, and prefer published pricing and a trial to a quote-only evaluation.
Source: vigilis.io/product · vigilis.io/pricing
At a glance
Every cell reflects what the vendor published on the pages reviewed in August 2026. A blank capability means it was not described there, which is not proof it does not exist.
| Vendor | Telecom expense | Managed mobility devices | Cloud / SaaS expense | Managed execution | Public pricing |
|---|---|---|---|---|---|
| Tangoe | Published | Published | Published | Published | Not shown |
| Calero | Published | Published | SaaS management published | Published | Not shown |
| Sakon | Published | Device lifecycle published | Not described | Not described | Not shown |
| brightfin | Published | Mobile expense published | Published | AI-powered managed services referenced | Not shown |
| Cass | Published | Published | IaaS and PaaS published | Fully managed | Not shown |
| Vigilis | Published | Not in scope | Not in scope | Published | Published |
How to use this list
Do not shortlist on the table. Shortlist on the three questions at the top, then take the seven-question evaluation checklist into each demo and make every vendor show you the same things: one real invoice at line level, a billing line with no inventory record, an inventory record with no billing line, a contracted rate being compared to a billed rate, a disconnect proven against a later invoice, a dispute through to the credit landing, and the data export.
Vendors that can demonstrate all seven live are systems of record. The rest are reporting layers, whatever the feature matrix says.
Related reading
- What is telecom expense management
- TEM software buyer’s guide
- Telecom inventory management
- All five vendor comparisons, each dated and sourced