Compare · Synergi alternative · FlowSync, the WorkSync engineering platform

WorkSync FlowSync and DNV Synergi do different jobs. Here is which is which.

Synergi is DNV’s. DNV describes Synergi Gas as detailed hydraulic modelling for complex gas networks and Synergi Pipeline Simulator as transient flow analysis and steady-state simulation for gas and liquid pipelines. WorkSync FlowSync automates the model build from the documents a GIS does not hold, then runs the everyday studies against live data. Three capabilities on this page belong to DNV outright, and we say which.

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For pipeline, midstream and gas-utility engineering teams · Every DNV statement cited below

What Synergi is

DNV's Synergi family, described the way DNV describes it

Three products, not one, and the distinction matters when you are scoping an evaluation.

Synergi Gas

Detailed hydraulic modelling for complex gas networks: distribution, transmission and gathering systems. DNV lists steady-state, extended period simulation, transient and thermal analysis, networks of 1,000,000+ nodes, and gas compositions from natural gas to hydrogen blends up to 100%, biogas, ammonia and CO2.

Sources 3, 4

Synergi Liquid

DNV describes it as detailed hydraulic modelling for complex liquid networks such as water distribution and midstream liquid gathering systems, with steady state and time varying analysis.

Source 4

Synergi Pipeline Simulator

DNV calls SPS an internationally recognised pipeline simulation and surge analysis software, for transient flow analysis and steady-state simulation for gas and liquid pipelines. Its modules include Statefinder, Leakfinder, Predictor, Trainer, Scenario Manager and an Operational Interface.

Sources 1, 2

What FlowSync is

FlowSync automates the model build, then runs the everyday study

One canonical asset model, built from the documents you already maintain and kept synced to live data, with the simulators you already own fed from the same model.

Model Builder

Reads PDFs, P&IDs, datasheets, vendor cutsheets, GIS layers and as-builts. Identifies equipment, traces flowpaths, populates specs, and maintains the model as new drawings and MOCs arrive.

Flow Simulator

Steady-state and transient hydraulics for gathering systems, transmission lines and distribution networks, running against the DataHub so a scenario sees current conditions.

Process Simulator

Gas processing, dehydration, sweetening, compression and separation, for the revamp and troubleshooting work that comes up every week.

Taylor

The engineering assistant over your project folder. Reads the drawings, datasheets and MOCs, and cites the source document on every answer.

Weeks to minutes

Hydraulic model builds moved from weeks of manual effort to minutes of verification.

Deployment account

2,000+

Miles of pipeline modeled on the WorkSync platform.

Deployment figure

Side by side

Dimension by dimension, with a source on every DNV statement

Click any superscript to land on the DNV page the statement came from. Rows where the honest answer is that FlowSync does not do something say exactly that.

FlowSync and Synergi, side by side

Sources read Oct 14, 2026

DimensionDNV SynergiWorkSync FlowSync

Who publishes it

DNV SynergiDNV publishes the Synergi family. Synergi Pipeline Simulator (SPS) is its transient pipeline tool; Synergi Gas and Synergi Liquid are its network modelling tools.^{Source 1,Source 4}

WorkSync FlowSyncWorkSync publishes FlowSync, the WorkSync engineering platform. Model Builder, Flow Simulator, Process Simulator and Taylor are its modules.

DNV publishes the Synergi family. Synergi Pipeline Simulator (SPS) is its transient pipeline tool; Synergi Gas and Synergi Liquid are its network modelling tools.^{Source 1,Source 4}

WorkSync publishes FlowSync, the WorkSync engineering platform. Model Builder, Flow Simulator, Process Simulator and Taylor are its modules.

What it is built to model

DNV SynergiDNV describes Synergi Gas as hydraulic modelling for gas distribution, transmission and gathering systems, and SPS as transient flow analysis and steady-state simulation for gas and liquid pipelines.^{Source 3,Source 1}

WorkSync FlowSyncHydraulic models for gathering systems, transmission lines and distribution networks, built from the drawings and GIS you already maintain, then kept synced to the DataHub.

DNV describes Synergi Gas as hydraulic modelling for gas distribution, transmission and gathering systems, and SPS as transient flow analysis and steady-state simulation for gas and liquid pipelines.^{Source 3,Source 1}

Hydraulic models for gathering systems, transmission lines and distribution networks, built from the drawings and GIS you already maintain, then kept synced to the DataHub.

Analysis types

DNV SynergiDNV lists steady-state, extended period simulation, transient and thermal for Synergi Gas, and steady-state, transient, thermal and batch tracking for SPS.^{Source 3,Source 1}

WorkSync FlowSyncSteady-state and transient for the daily-driver questions: sensitivities, capacity checks, line pack, blowdown.

DNV lists steady-state, extended period simulation, transient and thermal for Synergi Gas, and steady-state, transient, thermal and batch tracking for SPS.^{Source 3,Source 1}

Steady-state and transient for the daily-driver questions: sensitivities, capacity checks, line pack, blowdown.

Multiphase

DNV SynergiDNV states that the SPS core engine "does not perform transient multiphase simulation" and describes the engine as designed for single-phase liquid or gas systems.^{Source 1}

WorkSync FlowSyncAlso single-phase. Neither product is the answer for transient multiphase work.

DNV states that the SPS core engine "does not perform transient multiphase simulation" and describes the engine as designed for single-phase liquid or gas systems.^{Source 1}

Also single-phase. Neither product is the answer for transient multiphase work.

Model size and gas composition

DNV SynergiDNV says Synergi Gas models networks of 1,000,000+ nodes and handles natural gas, hydrogen blends up to 100%, biogas, ammonia, CO2 and custom mixtures, with equations of state including AGA, GERG-2008 and Peng-Robinson.^{Source 3}

WorkSync FlowSyncSized for operator and utility networks rather than million-node systems. Where your network is at that scale, Synergi Gas is the tool built for it.

DNV says Synergi Gas models networks of 1,000,000+ nodes and handles natural gas, hydrogen blends up to 100%, biogas, ammonia, CO2 and custom mixtures, with equations of state including AGA, GERG-2008 and Peng-Robinson.^{Source 3}

Sized for operator and utility networks rather than million-node systems. Where your network is at that scale, Synergi Gas is the tool built for it.

Building the model

DNV SynergiDNV ships a Model Builder module that integrates with GIS data and maps source attributes to model data, a Facilities Management module that synchronizes models with GIS updates without a full rebuild, and a web-based Automated Model Builder that works with available GIS and system data to build gas network models automatically.^{Source 3,Source 5}

WorkSync FlowSyncModel Builder reads PDFs, P&IDs, datasheets, vendor cutsheets, GIS layers and as-builts, including documents that were never in a GIS, and keeps the model current as new drawings and MOCs land.

DNV ships a Model Builder module that integrates with GIS data and maps source attributes to model data, a Facilities Management module that synchronizes models with GIS updates without a full rebuild, and a web-based Automated Model Builder that works with available GIS and system data to build gas network models automatically.^{Source 3,Source 5}

Model Builder reads PDFs, P&IDs, datasheets, vendor cutsheets, GIS layers and as-builts, including documents that were never in a GIS, and keeps the model current as new drawings and MOCs land.

Live operational data

DNV SynergiDNV says SPS connects your simulation model to live SCADA data, has been integrated with all major SCADA systems, and lists OPC-DA and OPC-UA. Synergi Gas imports data from SCADA, GIS, CIS and enterprise systems.^{Source 1,Source 3}

WorkSync FlowSyncSimulations run against the WorkSync DataHub, so a scenario sees current operating conditions without a load step.

DNV says SPS connects your simulation model to live SCADA data, has been integrated with all major SCADA systems, and lists OPC-DA and OPC-UA. Synergi Gas imports data from SCADA, GIS, CIS and enterprise systems.^{Source 1,Source 3}

Simulations run against the WorkSync DataHub, so a scenario sees current operating conditions without a load step.

Real-time leak detection and forecasting

DNV SynergiDNV ships Leakfinder for real-time leak detection, sizing and location, Statefinder for state estimation against live SCADA or DCS measurements, and Predictor to forecast pipeline behaviour hours or days ahead.^{Source 2}

WorkSync FlowSyncNot in FlowSync. We do not offer real-time leak detection, sizing or location.

DNV ships Leakfinder for real-time leak detection, sizing and location, Statefinder for state estimation against live SCADA or DCS measurements, and Predictor to forecast pipeline behaviour hours or days ahead.^{Source 2}

Not in FlowSync. We do not offer real-time leak detection, sizing or location.

Operator training simulators

DNV SynergiDNV describes SCADA-based operator training simulators, and a Trainer module that converts a transmission pipeline model into a realistic training simulator and helps maintain compliance records.^{Source 1,Source 2}

WorkSync FlowSyncNot in FlowSync. Nothing in the platform qualifies a controller.

DNV describes SCADA-based operator training simulators, and a Trainer module that converts a transmission pipeline model into a realistic training simulator and helps maintain compliance records.^{Source 1,Source 2}

Not in FlowSync. Nothing in the platform qualifies a controller.

An engineering assistant over your documents

DNV SynergiDNV describes Scenario Manager for scheduling Predictor simulations from a browser and an Operational Interface for browser-based, SCADA-style dashboards.^{Source 2}

WorkSync FlowSyncTaylor reads the drawings, datasheets and MOCs in your project folder and cites the source document on every answer.

DNV describes Scenario Manager for scheduling Predictor simulations from a browser and an Operational Interface for browser-based, SCADA-style dashboards.^{Source 2}

Taylor reads the drawings, datasheets and MOCs in your project folder and cites the source document on every answer.

No row on this table compares price, licensing or cost, in either direction. If a capability is not on a DNV page we read, it is not characterised here.

Where DNV is the better choice

Four evaluations where you should buy Synergi, not FlowSync

Three of these are capabilities FlowSync does not have. The fourth is a case where DNV's own product already solves the problem we would otherwise be selling you.

You need real-time leak detection on a pipeline

DNV’s Leakfinder does real-time leak detection, sizing and location, and Statefinder builds a state estimate against live SCADA or DCS measurements.^{Source 2} FlowSync does none of those things. If leak detection is the requirement, this is not a close call and we will say so on the first call.

You have to qualify controllers on a simulator

DNV’s Trainer module turns a transmission pipeline model into a training simulator and helps maintain compliance records.^{Source 2} There is no equivalent in FlowSync and none planned. Operator qualification is a Synergi Pipeline Simulator job.

Your network is at the scale Synergi Gas is built for

DNV states Synergi Gas models networks of 1,000,000+ nodes, with hydrogen blends to 100% and a long list of equations of state.^{Source 3} If that describes your system, the depth is real and FlowSync is not a substitute for it.

Your model-build problem is already solved by DNV

This is the honest one. If your network is fully and accurately represented in a GIS, DNV ships a web-based Automated Model Builder that builds gas network models from available GIS and system data automatically, plus a Facilities Management module that syncs the model to GIS updates without a full rebuild. An engineer at REN Portgás is quoted by DNV saying work that took three weeks now takes two to five days.^{Source 3,Source 5} Adding a second vendor to automate something your current vendor automates is not a good trade, and we would rather tell you that than sell past it. FlowSync earns its place where the source of truth is drawings, datasheets, vendor cutsheets and as-builts that were never in a GIS in the first place.

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Where FlowSync fits

Four evaluations where FlowSync is the right call

All four are about the step before the simulation: where the model comes from, how current it is, and who has to type it in.

The model has to come from documents, not a clean GIS

Model Builder reads PDFs, P&IDs, equipment datasheets, vendor cutsheets, GIS layers and as-builts, identifies equipment, traces flowpaths and populates specs. Where the real record of an asset is a drawer of drawings and a decade of MOCs, that is the ingest problem FlowSync was built for.

Daily-driver questions are queueing behind the deep tool

Capacity checks, sensitivities, a new connection, a revamp question that needs an answer this afternoon. FlowSync runs those against the current model, so the deep transient work keeps the specialist and the everyday questions stop waiting on one.

You want the simulation bound to live data by default

Flow Simulator runs against the WorkSync DataHub, so a scenario sees current operating conditions rather than a snapshot someone exported. Fewer steps between a question and an answer you would stake a decision on.

The answer has to cite the drawing it came from

Taylor reads every drawing, datasheet and MOC in the project folder and cites the source on every answer, which is what makes the answer reviewable by someone who was not in the room. Engineering knowledge stays in the system when a senior engineer retires.

Running both

The co-existence pattern, and the case where you should not add us

The pattern we recommend is co-existence, and FlowSync sitting in front of Synergi rather than on top of it. Model Builder ingests the documents, drawings and GIS layers into one canonical asset model. That model is the input a simulator expects, so it exports into Synergi for the transient and real-time work your team already runs there.

What changes is who does the data entry. What does not change is which tool does the deep work: Leakfinder stays the leak-detection system, Trainer stays the operator-qualification system, and the transient studies that belong in Synergi Pipeline Simulator stay there. We are not asking you to move a regulated workflow, and WorkSync does not replace Synergi.

If you already run Synergi and the only thing you want is model-build automation, read the fourth card above before you talk to us. DNV may already sell you the shorter path.

Common questions

Questions engineering teams ask when they are evaluating both

Who makes Synergi, and what is Synergi Pipeline Simulator?

DNV publishes the Synergi family. DNV describes Synergi Pipeline Simulator (SPS) as an internationally recognised pipeline simulation and surge analysis software used for transient flow analysis and steady-state simulation for gas and liquid pipelines. Synergi Gas and Synergi Liquid are DNV’s network modelling products: DNV describes Synergi Gas as detailed hydraulic modelling for complex gas networks, including distribution, transmission and gathering systems. Sources for every statement here are listed at the foot of this page.

Does WorkSync FlowSync replace DNV Synergi?

No, and we do not position it that way. FlowSync automates the model-build step and runs the everyday steady-state and transient scenarios against live data. DNV ships capabilities FlowSync does not have at all, including real-time leak detection, sizing and location through Leakfinder, state estimation through Statefinder, and operator training simulators through the Trainer module. Co-existence is the recommendation, with FlowSync feeding the model into Synergi.

Does Synergi already automate the model build?

In part, yes, and anyone comparing the two should know it. DNV ships a Model Builder module that integrates with GIS data and maps source attributes to model data, a Facilities Management module that synchronizes models with GIS updates without a full rebuild, and a web-based Automated Model Builder that works with available GIS and system data to build gas network models automatically. DNV’s own case page quotes an engineer at REN Portgás saying that what previously took three weeks is now achieved in two to five days. FlowSync’s ingest is aimed at the documents a GIS does not hold: PDFs, P&IDs, datasheets, vendor cutsheets and as-builts.

Can either one do transient multiphase simulation?

DNV states that the Synergi Pipeline Simulator core engine does not perform transient multiphase simulation, and describes the engine as designed for single-phase liquid or gas systems. FlowSync is single-phase as well. If transient multiphase flow assurance is your problem, neither of these is the tool, and we will tell you that rather than stretch the answer.

Is the Stoner Pipeline Simulator the same thing as Synergi Pipeline Simulator?

DNV’s current pages call the product Synergi Pipeline Simulator (SPS), and that is the name we use. An earlier version of this page asserted an acquisition date for the Stoner product line that we could not substantiate, so no acquisition history is stated here at all. For the provenance of the product name, DNV is the only authority worth quoting and their product pages are linked below.

Can FlowSync export its model into Synergi?

That is the integration the co-existence pattern depends on, and it is the first thing we scope in a pilot: the canonical asset model FlowSync builds, meaning topology, equipment and operating data, is the same class of input a network simulator expects. Bring a representative asset and the export is one of the things the 4-week pilot proves or disproves on your own data.

Which one should a gas utility planning team choose?

If the work is leak detection, controller qualification, or modelling a network at the scale DNV describes for Synergi Gas, choose DNV. If the planning model has to be rebuilt from drawings and as-builts before anyone can run a study, and the everyday studies are queueing behind the deep tool, that is the problem FlowSync was built for. Most teams we talk to end up running both, and we would rather scope that honestly than win an evaluation we should lose.

Sources

Every statement about the other product, and where it came from

Each item below was read on the vendor's own current public page on the date shown. Where a claim could not be sourced to one of these pages, it is not on this page at all.

DNV: Synergi Pipeline Simulator (SPS): pipeline design, simulation and performance analysishttps://www.dnv.com/software/services/pipeline/synergi-pipeline-simulator-index/Read October 14, 2026
DNV: Synergi Pipeline Simulator (SPS): moduleshttps://www.dnv.com/software/services/pipeline/synergi-pipeline-simulator-modules.htmlRead October 14, 2026
DNV: Synergi Gas: the most comprehensive hydraulic modeling software for gas networkshttps://www.dnv.com/services/synergi-gas/Read October 14, 2026
DNV: Synergi Gas, Synergi Liquid and Synergi Pipeline Simulator comparedhttps://www.dnv.com/software/services/pipeline/hydraulic-modelling-advanced-comparison/Read October 14, 2026
DNV: REN Portgás powers up for decarbonization with Synergi Gas Automated Model Builderhttps://dnv.com/cases/ren-portgas-powers-up-for-decarbonization-with-synergi-gas-automated-model-builder-242382Read October 14, 2026

Independence and trademarks

Synergi, Synergi Gas, Synergi Liquid and Synergi Pipeline Simulator are products of DNV. The product names used here identify those products for comparison only and remain the property of their respective owners. This page is published by WorkSync, is not affiliated with or endorsed by any of them, and was not reviewed by them before publication. Every statement about another company’s product is cited to that company’s own public page above. If you believe anything here is inaccurate, write to [email protected] and we will correct or remove it.

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