Build vs Buy: Should You Build Your Own Agent Orchestration?

Every engineering team building with AI agents eventually asks: should we build our own orchestration layer, or use an existing platform?

We're biased -- we built Mentiko. But we also built our own orchestration layer before deciding to productize it. So we've been on both sides.

Here's the honest calculus.

What you need to build

If you're building agent orchestration from scratch, you need:

The basics (week 1-2):

Process launcher for agent sessions
Basic chain definition format (JSON/YAML)
Sequential execution: A finishes, B starts
Logging and output capture

The "oh wait we need this too" layer (week 3-6):

Error handling and retry logic
Parallel execution (fan-out/fan-in)
Conditional branching based on agent output
Scheduling (cron or webhook triggers)
Environment variable and secret management
Timeout detection for stalled agents

The production layer (month 2-4):

Monitoring dashboard (which agents are running, what's failing)
Run history and audit trail
Multi-user access control
API for triggering chains programmatically
Workspace isolation (multiple projects)
Agent library management

The enterprise layer (month 4-8):

Multi-tenancy with organization isolation
Role-based access control
Secrets vault with encryption at rest
SSO/SAML integration
Data export and compliance features
SLA monitoring and alerting

This isn't hypothetical. This is roughly the order we built Mentiko's features, and the timeline is based on a small team (2-3 engineers) working full-time.

The cost of building

Let's be concrete:

2-3 engineers for 4-8 months = $200K-$600K in salary (depending on location and seniority)
Ongoing maintenance = at least 1 engineer half-time = $75K-$100K/year
Opportunity cost = those engineers aren't building your actual product

Total first-year cost: $275K-$700K. And that's before you account for bugs, security issues, and the features you didn't think of.

The cost of buying

Mentiko Starter: $29/month = $348/year.

Even the Enterprise tier with custom pricing won't approach the cost of building. And you get the entire feature set from day one -- multi-tenancy, secrets vault, visual builder, monitoring, scheduling -- everything.

When building makes sense

Be honest with yourself. Building your own makes sense when:

Agent orchestration IS your product. If you're building a platform that competes with Mentiko, obviously build your own.
You have exotic requirements. If your agents need to run inside a specific hardware enclave or communicate over a proprietary protocol, a general platform might not fit.
You have 10+ engineers and months of runway. Building is a luxury. Make sure you can afford it.
You want to learn. If the goal is education, building from scratch teaches you things a platform never will.

When buying makes sense

Buying makes sense when:

Agent orchestration is a means, not an end. You need agents to do something (automate content, review code, triage tickets). The orchestration is plumbing.
You need it working this week. Not this quarter. This week.
Your team is small. Every engineer building infra is an engineer not building product.
You want to iterate on chains, not infrastructure. The chain definition is where the value is. The orchestration layer should be invisible.
You need production features now. Monitoring, scheduling, error handling, multi-user access -- building these properly takes months.

The middle path

Some teams start by building a minimal orchestration layer (bash scripts, a cron job, some logging), then migrate to a platform when they outgrow it. This is actually reasonable if:

You start truly minimal (under 200 lines of glue code)
You don't over-engineer the glue code
You're honest about when the glue code becomes a maintenance burden

The mistake is building something "real" -- with abstractions, configuration systems, and a half-baked dashboard -- that's too complex to throw away but not good enough to rely on.

Our recommendation

If you're reading this, you probably need a platform. The teams that build their own don't read blog posts about build-vs-buy -- they just build.

Start with Mentiko. Define your chains. Run them. If you hit a wall that only a custom solution can solve, you haven't lost anything -- your chain definitions are JSON files you can take with you.

The worst outcome isn't picking the wrong option. It's spending three months building orchestration infrastructure when you should have been building your product.

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