Hotglue or Nango: Choosing Your Integration Platform

Your customers want integrations with their accounting software, their CRM, their ERP. You're deciding which open-source embedded integration tool gets you there fastest without burying your engineering team in connector maintenance. Hotglue and Nango both come up in that search, and they're genuinely different bets depending on what your team looks like and what your customers are running.

TLDR:

• Nango provides auth and proxy infrastructure for ~900 APIs, but your team writes and owns every sync script
• On-prem accounting systems like QuickBooks Desktop and Sage 300 CRE have no documented path in Nango
• Nango pricing starts free but gets harder to forecast as customer count and sync frequency grow
• Hotglue offers 650+ pre-built, forkable Singer-spec connectors with connector maintenance included in the service

What Is Nango?

Nango is an open-source integration infrastructure tool built for engineering teams that want code-level control over their integration layer. It provides TypeScript-based tooling for OAuth authentication, API proxying, and sync scripting across 900+ third-party APIs.

One distinction worth understanding before comparing: when Nango says "900+ APIs supported," that means authentication and proxying infrastructure for those APIs, not 900 pre-built, maintained, normalized data connectors. Your team writes and owns the sync logic itself. The Nango GitHub repository has accumulated over 10,700 stars, and the project has shipped 194 releases.

Nango fits teams with dedicated integration engineers who write TypeScript natively and are comfortable owning every line of sync code, though teams weighing Nango alternatives often have different needs. If that does not describe your team, the runtime-only model means more internal build burden than the marketing implies.

What Is Hotglue?

Hotglue is an embedded iPaaS and ETL tool built for B2B SaaS product teams. The core idea: your customers connect their tools (QuickBooks, Salesforce, Shopify, NetSuite, and hundreds more) directly inside your product, without you building and maintaining every pipeline from scratch.

A few things set the architecture apart:

• Connectors are open-source and Singer/Airbyte-compatible, so your team can inspect, fork, or extend any of them
• A Python transformation layer lets you control exactly how data is shaped before it reaches your backend
• The white-label widget and Magic Link onboarding mean end users never see "powered by hotglue"
• Pricing is per active tenant, not per data volume, so your bill scales predictably with your customer count

The typical user is a CPO or Head of Partnerships at a B2B SaaS company who needs to ship integrations fast but does not want to staff a dedicated integrations engineering function to do it — because hiring a team of integration engineers for every connector request is neither fast nor cheap.

Are Nango's Connectors Open Source?

Yes, Nango's code is publicly available on GitHub, and the sync scripts your team writes are TypeScript files you can read and modify. That's genuine openness.

The nuance is what "open source" actually covers. When Nango says "900+ APIs supported," that means authentication and proxying infrastructure for those APIs, not 900 pre-built, maintained, normalized data connectors. Your team writes the sync logic. The runtime is open; the connectors are yours to build.

Hotglue's open-source story works differently. The 650+ first-party connectors are Singer-spec and Airbyte YAML compatible, meaning each connector is an inspectable, forkable Python codebase. You can read exactly what fields are pulled, how records are shaped, and modify any of it. The broader Singer and Airbyte ecosystem extends that catalog further. With Nango, you own the sync scripts you write. With hotglue, you can fork connectors that already exist and run them, a distinction that also shows up clearly in a Hotglue vs Prismatic comparison.

Can I Customize Hotglue Connectors?

Every connector in hotglue's catalog is Singer-spec compatible and publicly forkable. You can pull any connector, read exactly what it does, extend the streams it covers, and run your modified version without asking anyone's permission. That is a different kind of open than "the runtime is public."

On top of the connector layer, hotglue's Python data-shaping layer lets you reshape data before it hits your backend. The workspace runs Pandas and Dask inside JupyterLab, with Git-backed version control so you can roll back any data conversion without drama. If writing Python from scratch feels like a detour, GluestickAI generates conversion code from plain-language descriptions, including joins across multiple sources and nested JSON handling.

The per-tenant model is where this gets particularly useful for ERP rollouts. Every customer's Sage or NetSuite config is slightly different. With hotglue, each tenant can carry its own field mappings and filtering rules without touching the connector itself.

Nango's customization relies on TypeScript sync scripting, which gives strong ownership to teams that want it. For a team with dedicated integration engineers, that control is a genuine advantage. For teams without that bandwidth, it means every new connector and every schema change lands on internal engineering.

Which Platform Handles On-Prem Accounting Systems?

On-premise accounting is where the architectural difference between these two tools becomes a hard boundary.

Nango's model is built around OAuth flows and API proxying, which works well for cloud SaaS APIs. Legacy desktop accounting systems like QuickBooks Desktop or Sage 300 CRE do not expose REST APIs — they were invented before REST was a twinkle in Roy Fielding's eye — so Nango has no documented path to support them.

Hotglue handles this directly. Here's what that looks like in practice:

• QuickBooks Desktop is supported via a Windows agent and the QuickBooks Web Connector, covering multi-company file environments with write support for Purchase Orders and Profit & Loss Detail reports in the unified v2 format.
• Sage 300 CRE uses a connector that installs on-premise, connects directly to the local database, and stays resilient to software updates (see this Sage 300 integration guide for the on-prem setup details).
• Sage 200, common in the UK market, is supported via a cloud proxy.

For SaaS companies selling into construction, real estate, or nonprofit verticals, a large share of customers still run these desktop systems, which is why a dedicated Sage 300 CRE connector matters for construction software vendors. That gap is not a minor inconvenience.

How Does Pricing Compare?

Nango offers four pricing tiers starting at $0, which is a genuine advantage for small teams who want to experiment before committing. That free entry point is real and worth acknowledging.

The model gets harder to predict as your customer count grows. Usage-based and connection-based tiers introduce billing variables that are difficult to model against your expansion revenue, since sync frequency and active connections can spike in ways that don't map cleanly to how you charge your own customers.

Hotglue runs differently. The base license is $1,500-$2,500/month, plus a per-active-tenant fee tracked on a 30-day rolling window. One tenant connecting to Salesforce, QuickBooks, and Shopify simultaneously counts as a single tenant. The model is designed to stay under 10% of a customer's MRR, so as you add customers, the cost scales in a line you can actually forecast.

For a CPO modeling integration costs against a new enterprise tier, that predictability matters more than a low entry price.

Head-to-Head Comparison Table

How Do Other Platforms Compare?

Other tools frequently appear in this comparison space, so here is a quick read on each.

Paragon targets SaaS product teams with a visual embedded integration builder. Base pricing runs around $70,000/year, which narrows the practical fit to teams with dedicated integration engineering budgets, prompting many buyers to look at Paragon alternatives instead. Teams often report a heavier commitment before they see working integrations in production, a pattern covered in depth in a Hotglue vs Paragon breakdown.

Prismatic is another embedded iPaaS with a visual component builder, positioned toward mid-market SaaS, as this Prismatic vs Hotglue comparison lays out in more detail. It works well for teams that prefer a low-code self-service approach, but per-tenant ERP customization at depth is harder to achieve without leaning back into code, which is why some teams browse Prismatic alternatives for deeper customization.

Pipedream is event-driven automation aimed at individual developers and small teams. End users interact with Pipedream's own interface instead of a host product's branded experience, which rules it out for multi-tenant embedded deployments where white-labeling matters.

Workato covers enterprise workflow automation broadly, but the embedded experience surfaces the workflow builder to end users instead of a native product UI, a gap that drives many teams to look at Workato alternatives. That tradeoff is fine for internal IT teams; for a customer-facing product, it tends to undermine the brand experience, as detailed in this Hotglue vs Workato comparison.

Apideck is a unified API aggregation layer. It does a reasonable job normalizing data across categories, but the architecture is not designed for stateful sync, bulk ETL, or per-tenant transformation logic that production SaaS integrations typically need.

Which Platform Is the Better Choice?

Nango is a well-built tool for the right team. If you have dedicated integration engineers writing TypeScript, want full ownership of every sync script, and are primarily solving for OAuth and API connectivity over pre-built data movement, Nango delivers real control. Its open-source repo, free entry tier, and growing AI agent auth support are genuine strengths for that profile.

The picture changes for B2B SaaS product teams shipping integrations to customers who run QuickBooks Desktop, Sage 300 CRE, NetSuite, or Shopify. Nango gives you a runtime; hotglue gives you 650+ forkable, Singer-spec connectors that are already built, already maintained, and already handling messy edge cases like multi-company file environments and on-prem database connections.

The combination of Python-powered per-tenant data shaping, tenant-based pricing on a 30-day rolling window, SOC 2 Type II compliance, and a support team that responds through a dedicated Slack channel instead of a ticket queue is designed for that production-scale, customer-facing use case. You get open-source visibility without inheriting the overhead of owning the entire runtime yourself.

If your team has the engineering bandwidth to write and maintain every sync script, Nango is worth a serious look. If your goal is to ship production integrations faster without staffing a full integration engineering function, hotglue is the stronger fit.

Frequently Asked Questions

Can I self-host either platform?

Both support self-hosting. Nango's self-hosted path is well-documented, but your team operates and maintains the infrastructure on top of writing sync scripts. Hotglue's self-hosted option exists, though most production customers run on hotglue's managed cloud (AWS ECS via Fargate), where the team handles runtime upgrades, infrastructure, and connector maintenance.

What happens if a connector breaks after launch?

Hotglue's integrations team actively monitors third-party API changes and migrates connectors to new endpoints when upstream APIs shift. With Nango, your engineers own the sync scripts, so upstream changes land on your internal team. For teams without a dedicated integrations engineering pod, that gap captures the entire build-vs-buy question in a single scenario.

Who maintains connectors after launch?

Hotglue owns connector maintenance as part of the service. New connectors go from API access to live in 1-2 weeks, with ongoing maintenance included. Nango's model requires your team to author and maintain TypeScript sync scripts. The runtime is provided; the integrations are yours to keep current.

Can hotglue handle bulk historical data syncs?

Yes. Hotglue is built for bulk and incremental data movement with stateful snapshots, covering real-time events and large historical loads alike. For onboarding customers who need three years of QuickBooks history or a full NetSuite GL reconciliation, that architecture handles it natively. Nango's sync scripts can be written to handle bulk pulls, but your team designs and maintains that logic from scratch.

Final Thoughts on Hotglue vs Nango for B2B SaaS Teams

Nango and hotglue are solving related but different problems. Nango gives engineering teams clean auth and proxy infrastructure; what you build on top of it is yours to maintain. Hotglue gives product teams a full connector catalog with on-prem support, per-tenant transformation logic, and a team that handles upstream API changes so you don't have to. For CPOs shipping integrations at scale, that maintenance model is worth a close look. Book a demo to walk through your specific integration requirements.

FAQ

Should my team choose Hotglue or Nango if we sell into accounting and ERP markets?

If your customers run QuickBooks Desktop, Sage 300 CRE, or NetSuite, Hotglue is the stronger fit: it ships pre-built, maintained connectors for these systems, including on-prem support via Windows agents and direct database connections that Nango's OAuth-and-proxy model cannot reach. Nango works well for cloud SaaS APIs, but legacy desktop accounting systems sit outside its documented scope.

What is the real difference between Nango's "900+ APIs supported" and Hotglue's 650+ connectors?

Nango's 900+ figure covers authentication and proxying infrastructure; your engineering team still writes, owns, and maintains every sync script on top of that runtime. Hotglue's 650+ connectors are pre-built, Singer-spec compatible Python codebases that your team can inspect, fork, and run without authoring the sync logic from scratch.

Who is Hotglue best suited for, and who should consider Nango instead?

Hotglue fits B2B SaaS product teams that need to ship production-grade, customer-facing integrations without staffing a dedicated integration engineering function: think CPOs and Heads of Partnerships moving fast on connector requests from enterprise customers. Nango is a better match for teams with dedicated TypeScript engineers who want full code ownership over every authentication flow and sync script.

How does Hotglue's per-tenant pricing compare to Nango's model as your customer base grows?

Hotglue charges per active tenant on a 30-day rolling window, and one tenant connecting to Salesforce, QuickBooks, and Shopify simultaneously counts as a single tenant, making costs straightforward to model against your expansion revenue. Nango's usage-based and connection-based tiers can introduce billing variables that are harder to forecast when sync frequency or active connections spike unpredictably.

What happens to your integrations when a third-party API changes after you've launched on each platform?

With Hotglue, the integrations team monitors upstream API changes and migrates connectors to new endpoints as part of the service, with no engineering work required on your end. With Nango, your team owns the TypeScript sync scripts, so any upstream API change lands directly on your internal engineering backlog.