FastConnect vs AWS Direct Connect vs Azure ExpressRoute

Every serious cloud estate eventually outgrows VPN and buys a private circuit: dedicated, predictable connectivity between the data center and the cloud, with consistent latency and bandwidth that the public internet cannot promise. OCI calls it FastConnect, AWS calls it Direct Connect, Azure calls it ExpressRoute, and at the physical layer they are siblings, cross connects in carrier neutral facilities, BGP sessions, redundant edges. The differences that change your bill and your architecture live in the commercial structure, the transfer charges, and the way each product handles redundancy and multicloud. Those are the differences this article compares. It is part of our series under the independent comparison of OCI, AWS, Azure, and Google Cloud.

How each product is built and bought

FastConnect is bought as a port: 1 Gbps, 10 Gbps, or 100 Gbps, through a FastConnect partner, a third party provider, or direct colocation cross connect. You pay a flat hourly rate for the port and nothing per gigabyte transferred in either direction. Direct Connect is bought as a dedicated port from AWS or a hosted connection through a partner, with an hourly port charge plus data transfer out billed per gigabyte at rates that vary by region. ExpressRoute is bought as a circuit of committed bandwidth through a connectivity partner, with a monthly fee and a choice of metered outbound billing or an unlimited plan at a higher flat rate. Three products, three billing philosophies: OCI sells you a pipe, AWS sells you a pipe plus a meter, and Azure lets you choose between a meter and a buffet.

Side by side

The transfer charge is the real comparison

Port charges across the three are similar enough that procurement rarely turns on them. The divergence is what flows through the port. A 10 Gbps link running a steady replication stream, a nightly warehouse load, or a DR pipeline can move hundreds of terabytes a month. On FastConnect that volume costs nothing beyond the port. On Direct Connect it generates a per gigabyte transfer bill that routinely exceeds the port cost several times over. On ExpressRoute metered it does the same unless you switch to the unlimited plan and pay the premium. This is the same egress philosophy we describe across the platforms in OCI vs AWS and OCI vs Azure, expressed in its purest form: OCI treats data movement as something the port already paid for, the others treat it as a revenue line. For data heavy architectures, model this line item first; it will likely decide the comparison before any other factor is weighed.

Redundancy, SLAs, and the failure you plan for

All three products fail at the cross connect, the edge device, or the carrier, so all three want you to buy two of everything. FastConnect publishes an availability SLA when you run redundant virtual circuits across diverse edges, and the design guidance is simple: two ports, two locations where geography allows. Direct Connect formalises resiliency tiers, from a single connection with no meaningful SLA to maximum resiliency with four connections across two facilities, and the SLA follows the architecture you pay for. ExpressRoute builds the pair in from the start, every circuit terminates on two links, and zone redundant gateways harden the cloud side. The honest operational note: the SLA covers the provider's gear, not your BGP configuration, and most private circuit outages we are called into are routing mistakes, not hardware. Whichever product you choose, failover testing on a schedule is worth more than the SLA percentage.

The multicloud interconnect

One corner of this market is unique to the OCI and Azure pair. The Oracle Azure interconnect links OCI and Azure regions directly with low latency, letting an application tier in Azure talk to an Oracle data tier in OCI as if they shared a campus, and Oracle Database@Azure extends the same partnership further. There is no equivalent first party interconnect between AWS and either of them; AWS multicloud links run through partner fabrics or your own colocation mesh, which work but add parties and latency. For estates planning a split between an Oracle data platform and a non Oracle application cloud, this changes the connectivity design space materially, and it is one of the patterns we implement most often in our OCI networking practice.

A decision framework

Where each one wins

FastConnect wins on commercial simplicity and on any architecture that moves serious data volume, because the absence of a transfer meter removes both cost and the perverse incentive to architect around your own bandwidth. Direct Connect wins where the estate is AWS and the volumes are modest, and its resiliency tiering is the most explicit of the three for compliance documentation. ExpressRoute wins inside Microsoft centric estates, especially with the unlimited plan absorbing heavy flows, and its native pairing with OCI makes the split Oracle and Azure estate the best connected multicloud pattern available today. As ever, the right answer is workload led: the circuit serves the architecture, and the architecture should be designed before the procurement, not after.

Bringing it together

Private connectivity is a solved engineering problem sold three different ways. FastConnect bills like infrastructure, Direct Connect and metered ExpressRoute bill like a utility, and the gap between those models grows with every terabyte your estate moves. Measure your flows, price the meters honestly, buy redundancy from the start, and test the failover you paid for. The connectivity layer is unglamorous until the day it is the only thing that matters, and it rewards the same discipline as everything else in the estate: design first, then commit.