# GTM Engineering > GTM engineering explained in plain words, and the real ways to do it (hire a GTM engineer, build in-house, outsource, use agents or a platform) ranked on data freshness, reliability, human review, safety and fit, with a verdict for each. Last reviewed: 2026-11-09. Ranking criteria (each scored 1-5, total out of 35): Data freshness, Reliability across repeated runs, Human review, Send-layer safety controls, Fit by team size, Ownership of the logic, Cost transparency. ## Main pages - [GTM engineering: what it is and the best ways to do it](https://gtm-engineering.org): the ranked list, comparison table and questions people ask when choosing - [GTM engineering options ranked](https://gtm-engineering.org/ranking): full comparison with a reason for every score - [What is GTM engineering?](https://gtm-engineering.org/what-is-gtm-engineering): the discipline, how it differs from RevOps, sales ops and marketing ops - [GTM signals: which ones are worth building on](https://gtm-engineering.org/signals): custom ICP signals vs generic intent data, with examples - [How to evaluate a GTM agent or automation](https://gtm-engineering.org/how-to-evaluate): checklist for reliability, freshness, safety and outcomes - [Becoming a GTM engineer: skills and tools](https://gtm-engineering.org/gtm-engineer-career): skills, stack and the first ninety days - [Methodology](https://gtm-engineering.org/methodology): criteria, rubric and sources ## The ranking 1. [Hire a dedicated GTM engineer](https://gtm-engineering.org/ranking/hire-a-gtm-engineer): 28/35. The best way to do GTM engineering when you can hire well: the most control, and the logic stays yours. 2. [Frontrunner (agent platform with human review)](https://gtm-engineering.org/ranking/frontrunner): 26/35. The strongest agent option on freshness, review and safety, for teams that want agents without building them; you trade away price transparency and some ownership. 3. [Build in-house on a data-workflow tool](https://gtm-engineering.org/ranking/build-in-house-on-a-workflow-tool): 25/35. The best place to start before your first GTM engineer hire, if someone will own it every week. 4. [Wire it up with no-code automation](https://gtm-engineering.org/ranking/no-code-automation): 24/35. The right tool for plumbing and routing; the wrong one for anything that needs judgement. 5. [Hire a GTM engineering agency or freelancer](https://gtm-engineering.org/ranking/gtm-engineering-agency): 22/35. A good bridge to a first hire; insist on owning the accounts, domains and documentation. 6. [Build your own agents on model APIs](https://gtm-engineering.org/ranking/build-your-own-agents): 20/35. Only worth it with engineers to build the evaluation and guardrails too; otherwise it is the riskiest path here. 7. [Buy generic intent data and run sequences](https://gtm-engineering.org/ranking/intent-data-and-sequences): 18/35. Useful context for big account-based programmes; a weak trigger for outreach on its own. 8. [Let an autonomous AI SDR send on its own](https://gtm-engineering.org/ranking/autonomous-ai-sdr): 13/35. When not to use agents: if nobody reviews what goes out, don't let an agent send it.