A conventional sewing machine is the more versatile first machine for straight seams, topstitching, zippers and buttonholes. A serger, also called an overlocker, trims and wraps a fabric edge with thread as it sews, which is useful for finishing seams and working with many knits. A coverstitch machine performs a different task, often creating knit hems with parallel top stitches and a looper finish underneath.
A serger is a useful specialist tool, but it does not cover every job a sewing machine handles. A coverstitch machine is another specialist with a separate purpose; see our coverstitch vs. serger comparison if knit hems are your main question. Decide based on the seams you make most often and whether you want a separate machine for finishing edges.
Side by side
A conventional sewing machine constructs seams and adds detail stitches. It handles work such as straight seams, topstitching, zippers and buttonholes, using a needle and bobbin thread. It is the core all-purpose machine for many sewing rooms.
A serger or overlocker trims and wraps fabric edges with an overlock stitch. It can finish seams, hems and many knit seams by using needles and loopers to wrap threads around an edge. It can complement a sewing machine when edge finishing is frequent.
Brother describes overlockers as machines that trim excess fabric and finish raw edges in one step. The model’s threading system, stitch options and fabric guidance determine which tasks it supports.
Decide whether you need one
Choose a conventional machine first if you are learning garment construction, quilting or home projects and want one tool for many operations. Add a serger if you regularly finish garment seams, sew stretch fabrics or want a consistent edge finish. You can still sew many projects without one.
Our sewing machine buying guide covers the first-machine decision, and the embroidery machine guide compares a different specialist tool. Browse sewing and embroidery.
Official reference
Common questions
Can a serger replace a sewing machine?
Usually not. A serger is designed for overlock seams and edge finishing, while a conventional machine handles many construction and detail stitches such as topstitching and buttonholes.
Do I need a serger to sew knit fabric?
No. A conventional sewing machine with a suitable stretch stitch can sew many knit projects. A serger is a convenient option for trimming and finishing the seam in one operation.
Should a beginner buy a serger first?
Start with a conventional sewing machine if you want one machine for varied projects. Consider a serger later if you regularly sew garments and want its overlock seam and edge-finish workflow.
Is a coverstitch machine the same as a serger?
No. A serger trims and wraps raw edges; a coverstitch machine makes a different stitch commonly used for knit hems. See our [coverstitch vs. serger guide](/guides/coverstitch-vs-serger-guide).