HEAD TO HEAD
Bloom Security matched with Harmonic Security: agentic endpoint security compared
SHORT ANSWER
On our published weights Harmonic Security scores higher overall, 5.90 to 4.65 out of 10. Bloom scores higher on capability rules; Harmonic scores higher on stop before it runs, actor trail, rollout path, cloud and workspace reach, named agent coverage and public proof; they tie on verdict range. Which fits depends on which of those criteria matters most to you.
By The Agent Desk · Agentic Endpoint Compare · Published 2026-10-11
Desk research from public vendor pages, press releases and standards pages read on 27 September and 11 October 2026. Editorial assessment; we did not run the products.
How do they compare at a glance?
Bloom Security
Inventory and supply-chain rules for endpoint software
Rank 6 of 6 among agentic endpoint vendors
Harmonic Security
Coaching people through AI data risk
Rank 6 of 8 among broader AI security platforms
Which scores higher on each criterion?
| Criterion | Weight | Bloom Security | Harmonic Security | Higher |
|---|---|---|---|---|
| Stop before it runs | 25% | 6 / 10 Defines what agents can access, execute and transmit; runtime decisions on individual actions are not detailed. Source: Bloom Security homepage · Read 27 Sep 2026 | 7 / 10 Governs at the MCP layer and at the tool surface and can block in real time. Source: Harmonic Security: Harmonic Command · Read 27 Sep 2026 | Harmonic |
| Verdict range | 15% | 3 / 10 Documents 2 of six verdict types: Block or deny and Remove or scale back. "Blocks malicious or policy-violating packages and skills; removes risky tools, revokes permissions and scales back overpermissioned MCP servers." Source: Bloom Security homepage · Read 27 Sep 2026 | 3 / 10 Documents 2 of six verdict types: Block or deny and Alert or warn. "Block in real time, warn the employee with context, or log silently." Source: Harmonic Security homepage · Read 27 Sep 2026 | Tie |
| Capability rules | 15% | 8 / 10 Rules on what agents can access, execute and transmit, automatic scaling back of overpermissioned MCP servers, and package and skill policies across npm, Chrome Web Store and Open VSX. Source: Bloom Security homepage · Read 27 Sep 2026 | 7 / 10 Harmonic Command sets which systems agents can read, write to and act on. Source: Harmonic Security: Harmonic Command · Read 27 Sep 2026 | Bloom |
| Actor trail | 10% | 4 / 10 Not described on the pages we read. Source: Bloom Security homepage · Read 27 Sep 2026 | 6 / 10 Unified governance for people and agents; per-action attribution is not detailed. Source: Harmonic Security: Harmonic Command · Read 27 Sep 2026 | Harmonic |
| Rollout path | 10% | 4 / 10 Deployment method not published. Source: Bloom Security homepage · Read 27 Sep 2026 | 8 / 10 Rolls out through Intune, JAMF, Kandji or Group Policy. Source: Harmonic Security homepage · Read 27 Sep 2026 | Harmonic |
| Cloud and workspace reach | 10% | 2 / 10 Endpoint fleet only; no cloud, SaaS or homegrown agent coverage described. Source: Bloom Security homepage · Read 27 Sep 2026 | 4 / 10 Browser, desktop, CLI, MCP gateway and API surfaces; agents running in cloud workspaces or cloud apps are not described. Source: Harmonic Security homepage · Read 27 Sep 2026 | Harmonic |
| Named agent coverage | 5% | 0 / 10 Names 0 of the six agents we track: none. Source: Bloom Security homepage · Read 27 Sep 2026 | 3 / 10 Names 2 of the six agents we track: Claude Code and GitHub Copilot. Source: Harmonic Security pricing (re-read 11 October 2026) · Read 11 Oct 2026 | Harmonic |
| Public proof | 10% | 5 / 10 SOC 2 listed and a $20 million seed round reported by Ctech (secondary); pricing and deployment detail not published. Source: Ctech by Calcalist (secondary): Bloom Security seed round (30 July 2026) · Read 11 Oct 2026 | 7 / 10 Tier names are published (Explore, Guide, Command) but no prices. Source: Harmonic Security pricing · Read 27 Sep 2026 | Harmonic |
Which verdicts does each document?
| Verdict type | Bloom Security | Harmonic Security |
|---|---|---|
| Block or deny | Documented | Documented |
| Ask a person | Not described | Not described |
| Alert or warn | Not described | Documented |
| Mask or modify | Not described | Not described |
| Simulate first | Not described | Not described |
| Remove or scale back | Documented | Not described |
- Bloom Security: "Blocks malicious or policy-violating packages and skills; removes risky tools, revokes permissions and scales back overpermissioned MCP servers."
Source: Bloom Security homepage · Read 27 Sep 2026
- Harmonic Security: "Block in real time, warn the employee with context, or log silently."
Source: Harmonic Security homepage · Read 27 Sep 2026
How does each reach devices?
Harmonic Security
Intune, JAMF, Kandji or Group Policy.
Source: Harmonic Security homepage · Read 27 Sep 2026
Which agents does each name?
| Agent | Bloom Security | Harmonic Security |
|---|---|---|
| Claude Code | Not named | Named |
| Cursor | Not named | Not named |
| GitHub Copilot | Not named | Named |
| OpenAI Codex | Not named | Not named |
| Windsurf | Not named | Not named |
| Claude Desktop | Not named | Not named |
| Named | 0 of 6 | 2 of 6 |
Which should you choose?
Choose Bloom Security if you need capability rules and stop before it runs. Bloom Security is best for: Inventory and supply-chain rules for endpoint software.
Choose Harmonic Security if you need rollout path and stop before it runs. Harmonic Security is best for: Coaching people through AI data risk.
Frequently asked questions
Which is better for agentic endpoint security, Bloom Security or Harmonic Security?
On our published weights Harmonic Security scores higher overall, 5.90 to 4.65 out of 10. See the criterion table above for where each scores higher.
Which stops an agent action before it runs more fully, Bloom Security or Harmonic Security?
Harmonic Security scores higher on stopping an action before it runs (7 to 6). Bloom Security: Defines what agents can access, execute and transmit; runtime decisions on individual actions are not detailed. Harmonic Security: Governs at the MCP layer and at the tool surface and can block in real time.
Do Bloom Security and Harmonic Security publish prices?
Bloom Security: not published. Bloom Security publishes no pricing. Harmonic Security: not published. Three tiers are named (Explore, Guide, Command); prices are not published.